>> ♪ We've got two days to get this straight ♪ We've got a challenge just won't wait ♪ Our eyes are on the prize ♪ An engineer just set the date ♪ We've got this client can't be late ♪ Oh, no it's go time ♪ Build it, test, fix it debug, nail, kick it ♪ Got to get it off the ground yeah ♪ Stick around and you'll see what teamwork's supposed to mean ♪ It's so key Design Squad ♪ Design Squad.

♪ >> Guys, they're calling!

>> Design Squads, welcome to your final challenge.

Now, as you know, Wes is in the lead with 500 points, which means that he is locked into compete for the college scholarship from the Intel Foundation.

The question is: who will be competing against him?

Now, this is an unprecedented moment in Design Squad history, because we have a three-way tie for second place.

The tie is between Lindsey, Juan, and Annelise, so we have to have a tie-breaker.

The tie-breaker will be coming in the form of a mini-challenge.

So to find out what the mini-challenge is follow me.

Your tie-breaker challenge is to build a kite.

The catch is you've got to build the kite out of gift wrap.

>> Woo-hoo!

( laughter ) >> Now, this is the key: Juan, Annelise, and Lindsey are going to be building this by themselves.

It's an individual build.

>> Ooh!

>> And that's because Wes, Ana, and Zach are going to be judging the winner.

>> Hey!

( laughter ) >> Now, they're going to be out of the building while the build is happening, so they won't know which kite is from which person.

I will be flying, and they'll be having the majority vote to decide who goes head-to-head against Wes for the college scholarship.

Are there any questions?

Let's do it.

The two hours starts in three... two.. one... now!

♪♪ >> I'm just going for the straight-up delta kite.

I'm going to go get some dowels.

♪♪ A kite out of gift wrap?

I don't like my odds.

I'm expecting Lindsey to win, because she's really smart, and she works hard.

>> Working alone feels a little bit different.

I don't have anyone to share ideas with.

I'm going to make a bird.

>> I don't know much about kites, so it'll be interesting.

It's nice, you know, to be on my own so I know if I mess up, it's my own fault; if I do well, it's my own fault.

I like... you know, being self-dependant .

>> If I had to pick someone else to go against, I would probably pick Annelise, because then I get to pick Juan on my team, and I think that would be a pretty good team.

>> Am I pretty good under pressure?

I don't think I'm bad.

I just do what I can with what you give me.

>> I'll have this as my body.

>> I'm just going to make a standard diamond kite.

I hope it's going to fly, but if it's going to crash and burn, it's going to look pretty before it does.

>> One hour left, Design Squads-- one hour!

( tense music playing ) >> I've been working hard for a whole season.

It all comes down to one kite.

If I win, I go can on; if I lose, I don't.

>> It's all or nothing.

>> I'm a little bit nervous right now.

>> I'm having mixed feelings about this.

>> I'm not confident at all, you know?

It could go any way.

All you can do is give it your best shot.

>> Looks so fragile!

>> To make a tail or not to make a tail.

( tense music playing ) >> All right, Design Squads, your time is up!

Let's take the kites over to the field and meet your clients.

>> What's up, guys?

>> Ready to break the tie?

>> We're ready.

>> All right, we're going to start with kite number one on the top.

Wes, can you help me launch it?

>> Of course.

>> Let's do this.

>> Good luck, guys.

>> Ready for kite number one?

Good?

>> Yup.

>> Let's do this.

>> Oh!

>> Come on, birdie, fly!

>> All right, let's try kite number two.

>> Oh, this one's great.

It's too neat to be Juan's, though.

>> Let it go.

>> Oh!

>> ( screams ) ( laughter ) >> Oh, my gosh!

( laughter ) >> All right, kite number two can successfully dive-bomb.

Let's try kite number three.

Kite number three!

>> That's pink.

Let it go.

>> Oh!

Oh!

>> Oh!

>> Oh, my gosh!

>> That was pretty neat.

>> Yeah, it was... twirly.

( laughter ) >> Do it again, do it again.

>> And that is that.

>> Oh is it, "that's that," Mrs. That's That.

>> Why do you say so much?

>> You mean, like, speak?

>> Hey, guys, let's huddle up.

Let's go, Wes.

Hey, Zach, Ana, come on.

All right, you guys.

What did you think of kite number one?

>> Hmm... >> It had a cool design.

>> It was really pretty, but it didn't fly.

>> Yup, it just kind of kept spinning.

>> Yours had some cool spinnage going on.

>> Kite number two?

>> I mean, it just jumped.

It didn't even really fly that well, so... >> It almost knocked Juan out, so that's a plus.

( laughter ) >> I think if mine was bigger, it would have been more stable.

>> And last-- kite number three?

>> It had a really, really cool twirling motion.

I loved it.

>> It was the one that flew the best... >> Yeah.

>> ...in my opinion.

>> I guess mine flew a little bit, but it still fell.

I...

I mean, they wanted a maneuverable kite, I mean... >> But... >> ...they all fell.

>> Should we go announce the winner?

>> Yeah.

>> Yeah.

>> Let's do it.

>> Let's go.

>> All right, guys, your clients have come to a decision.

Guys?

>> Okay, guys, we decided on kite number three.

>> And whose kite was kite number three?

>> Juan!

( cheers and applause ) >> Congratulations, Juan.

So it's Juan versus Wes for the Intel Foundation scholarship.

So now it's time to pick your teams for the final challenge.

Gentlemen, if you'll follow me to the stands.

>> All right.

>> That's a nice kite you got there.

>> All right, gentlemen, it is time to pick your teams, and the key is you don't even know what the challenge is.

I'm going to flip a coin-- Wes, you can call it.

Who ever wins gets to pick first.

Sir?

>> Tails.

>> Heads it is.

Juan, it's your choice.

>> ( sighs ) Okay.

>> Oh!

>> I know he's a little... angry at times, but what I need right now is someone who can design, someone who can come up with ideas, so I got to go with Zach.

>> All right, Wes?

>> ( sighs ) >> I don't know, like, I think that either one of them would want to pick me, right?

( laughter ) >> Lindsey's like, "I'm the best; obviously I'm going to be on the better team."

>> I'm going to have to go with Lindsey.

I like her ideas, and she's a hard worker.

>> I knew you were going to do this-- I knew it!

I knew we were going to do this.

Huh.

See, I don't know who to pick now.

>> I have no idea whose team I'm going to be on.

>> I know, me neither.

>> See, because if I pick Annelise, Zach and Annelise are going to have their little debate.

( laughter ) >> You shorted the wires.

We have to fix it.

>> She's horrible, I just...

I don't like her at all.

>> And if I pick Ana, she's going to make things pretty.

I need...

I need Zach at his game.

I need Zach at his game, so...

I'm going to have to go with Ana.

>> Ana?

All right.

>> I mean, if I would've picked Annelise, Zach would've been really mad the whole time.

He wouldn't be able to do anything.

>> This is true.

>> See, and that's why you picked Lindsey.

I knew, I knew, you little... >> All right, guys, that's it.

Let's shake hands.

May the best engineer win, and we'll go to them the teams.

>> Good luck, bro.

>> See you there, man.

>> I think we're going to find out soon, because it looks like they're coming.

( making drum roll sounds ) >> Design Squads, your team leaders have chosen.

Juan won the coin toss, so your up.

>> Zach.

>> What's up, dog?

>> Wes?

>> Lindsey.

>> Nice!

>> Yup.

>> Yay!

( laughter ) >> My turn, and I chose Ana.

>> Yeah!

>> Annelise.

>> Yeah, dog.

( laughter ) >> Give me some love.

>> All right, let's go back to the shop, get in your team colors, and we'll head out to the location for the last challenge.

>> Aw, all right!

>> Let's do it!

Yeah!

♪♪ >> I'm pretty psyched that I'm in the finale now that I'm there.

I'm not tied with anybody; it's just me and Wes.

It's a great feeling.

>> I think going against Juan for the Intel scholarship is going to be pretty tough.

When we worked together the first challenge, we were feeding off each other's energy.

But now, going up against him... it's definitely going to be interesting.

I just brought my "A"-game.

>> Really?

( laughter ) >> Yeah!

>> Where are you?

>> You should've left that at home, dude, it's not going to do you any good!

It's just me and him-- me and him.

He chose his two people, I chose my two people.

I mean, I...

I took a risk, and I'm going to see how it's going to play out.

>> This is going to definitely going to be interesting battle.

>> So tell me, Design Squads, do you guys have any ideas about what we're doing?

How do you know it's not like an outdoor computer engineering challenge?

>> Because that would be dumb.

( laughter ) >> Don't make me stop the van.

( laughter ) >> Nate, are we there yet?

( laughter ) >> Nate, are we there yet?

>> How about now?

>> Are we there yet?

>> Nate, are we there yet?

( cheering ) ♪♪ >> Hey, you guys, see the island right straight ahead with the cove, there?

>> Yeah.

>> That's where we're going.

♪♪ Welcome to Misery Island.

This is the site of your final challenge.

( cheers ) The theme is "Escape From Misery Island."

( laughter ) >> ( sighs ) Your task is to build sailboats.

>> Oh!

( laughter ) >> It's a race to the finish.

>> You mean... >> Take a look behind us right across the way, there.

It's about a half-mile across.

That's the finish line.

First sailboat to that beach wins the Intel scholarship.

Now, there's a couple catches.

Three people have to be in the sailboat.

It's the entire team; major team effort.

There is no paddling; you have to be sailing.

So are you guys ready to see where you're going to build?

>> Ready!

>> Yeah!

>> Let's escape from Misery Island!

This way!

Come with me.

>> When I first heard that we had to make a sailboat, I mean, my brain was, like, on fire.

>> I...

I was just shocked.

I mean, I think the disadvantage on our side is that I'm about 100 pounds heavier than everybody else on the other team.

>> I'm just worried about tipping over.

I mean, I'm not that good of a swimmer.

I mean, that's... that's pretty far to be sailing.

>> It's just something we have to deal with.

>> Hey, you guys, see straight ahead?

This is your build site for the final challenge.

>> Oh, yeah!

>> Start brainstorming.

>> Oh yeah, Purple Team!

We've got foam, PVC, wood... >> Aluminum.

>> This looks like it could be a sail.

>> I'll give you the pop-up book; it's easy for you to understand.

>> Pop-up books are a lot of fun.

>> Oh, there's some books.

>> Sailing books?

>> We'll have to make a list of the important parts you need in a boat.

>> A sail.

>> That's a good place to start.

A sail harnesses wind to propel a boat.

A large main sail is supported vertically by a mast and horizontally by a boom that can rotate 180 degrees to catch the wind.

A smaller, fixed sail, called a jib, adds more power.

The hull is the body of the boat, and sailboats can have more than one.

Multi-hull boats are more stable, because their hulls are narrow and spread apart, so they're harder to flip over.

A keel is a heavy blade on the bottom of the hull that prevents the boat from moving sideways.

When the wind pushes against the sail, the flat side of the keel pushes against the water, resisting the sideways motion to keep the boat moving forward.

Smaller sailboats have a centerboard, which is a keel that can be raised or lowered, and a rudder and tiller steer the boat.

>> I just...

I want to see if there are catamarans.

>> Okay.

"Catamarans are similar to dinghies except they have to hulls, but they need a good breeze to really get going and are not a good choice for light winds."

>> Yeah, I think we should go with the single hull.

>> I think our hull is going to be the most important part.

>> Okay, okay.

>> So I think that a catamaran is going to be way easier to build it and for it to work, and it's going to be faster.

>> So what do you... what do you suggest?

>> Catamaran, or single hull?

>> I...

I think we do a...

I mean, a catamaran.

>> But here's the thing about the hull shape: if your hull's more like this, you're less likely to tip over.

What if, like, we had a boat with outriggers, so that way it also doesn't tip?

>> Yeah.

>> Yeah.

>> We can try that, but I was thinking more of having the outriggers wider out here, connected like that.

But I think this something we should sketch model.

>> Okay.

>> If we use this as the keel... >> If I give you a sailboat, you can sail it to me half a mile?

>> Um... if... >> You can sail half a mile.

>> Okay, if you're not listening, then why am I talking?

>> No, no... >> No, I'm listening, I'm listening.

>> Okay.

If we... if we can use this as the keel and we can build off of it.

>> We get this piece of foam here, cut it so it has that triangle shape on the bottom, so it displaces more... more water so it can hold up more weight.

That's one hull, then a piece of foam... >> Dude, I don't... >> I'm not following you at all.

>> Ugh, man!

A catamaran-- it's, like, two hulls.

>> Okay.

>> See?

With the hulls.

It's not as thin as you think.

Whatever, don't listen to me.

I guess you'll figure it out.

>> No, like, I'm not...

I'm trying to understand what you're trying to tell us.

Like, so you're saying the front view to look like this.

>> Uh-huh, like that.

>> How?

>> And then we connect them in the middle?

>> Yeah, but you can sit there.

You can sit there.

>> Okay, yeah.

>> Oh, like this.

Like... >> Because it's going to be a... like, a wide area.

It's not going to be, like, little... you know?

>> What do you think?

>> Yeah, I don't know if that's what we were going to do... >> Yeah, that... we had that from the beginning.

I don't...

I thought you were trying to tell us something else.

>> But you were thinking about foam, and foam is not going to hold you.

>> Yeah, well, I mean, I was thinking we can make this out of foam.

I mean, to get the displacement down.

>> Oh, no, man, I don't think that's going to be enough.

>> Wrap it up, Design Squads.

That's it for Day One.

I'll see you back for more tomorrow!

( laughter ) >> Let's go to the beach.

The boat's going to pick us up right over there.

>> Nice rain gear.

♪♪ >> I can't say if I'm confident or not.

It could be anybody's game.

>> I'm just taking everything one step at a time.

Just want to focus on getting the structure down and making sure our sailboat is in good shape.

>> Wes has a good team, I have a good team... depends on who Poseidon favors.

♪♪ >> All right, team, we're going to start sketch modeling.

>> Definitely.

>> What I want to get done today is the sketch model.

Then we can start building the hull.

>> Hey, guys... ( whistles ) >> Battleship!

Ready to go test?

I'll hold it...

I'll hold it like you.

Oh, my jeans are soaking wet now.

>> This one is pretty stable.

>> I definitely think the outriggers are a good idea, and our real boat is going to be foam, so we won't be sinking.

>> I think we've seen enough.

>> I know.

>> All right, let's go in and talk about it.

♪♪ Okay, what's the damage?

>> All right, so I really like this design... >> Uh-huh?

>> ...because with the outriggers it provides extra support.

>> I definitely agree.

>> Ana, go put it in the water.

Oh, okay!

( cheering ) It's moving!

>> Okay, okay, now we're going to have about 600 ponds in this thing.

>> Well, that's a lot.

>> That's a lot.

>> But the boat can still float, and here's why: Archemedes' Principle says that an object will float if it displaces an amount of water equal to its own weight.

As the weight of the sailboat pushes downward, the hull displaces, or moves, water out of the way.

A force equal to the weight of the displaced water, called a buoyant force, pushes upward on the bottom of the boat keeping it afloat.

>> Well, it floats and it's stable.

>> You guys think we've seen enough?

>> Yeah.

>> Okay, let's go, Ana.

♪♪ >> So you guys, want to start cutting?

>> Yeah, I think we should start.

>> Hey, we need a bigger coffin.

This thing doesn't fit me.

They can't see me.

They don't know where I am.

>> So what if we start thinking about dimensions and making this full-size?

>> Annelise, can you show me how you're sitting?

>> Probably like... >> I'll sit at the end of the boat and I'll steer.

>> All right, so I guess we have to figure out exactly how we're going to build the hull so it's structurally sound.

>> My idea was to sandwich the foam on either side.

It can be nice and secured.

>> Serious boat-building going on now.

Let's see, what do you have under this right now?

Is it going to be these boards like that?

>> No, it's just going to be a two-by-four on this edge and that edge.

>> You guys are talking about using this as a structural material?

What would happen if you put a two-by-four on either side of this and you guys all three stood in the middle?

>> It'd probably break.

>> Yeah... bam!

>> So what if we made the base out of plywood; same shape as the foam?

Just build a hull and then stick the foam on the bottom?

>> Yeah, that's what I would go for.

Good stuff, but come get me when you want to throw stuff in the water.

>> All right.

>> I'm stoked.

>> Get out of here.

So do you want me to go get some plywood?

>> Yeah, let's do it.

>> Let's go.

♪♪ >> Okay.

>> So now we've got to bend it so it has tip in front.

>> Okay.

( cracking noise ) >> Ooh, that sounds really good.

( laughter ) >> It's supposed to sound like that.

>> Don't worry about it.

( cracking noise ) >> Uh... ( laughter ) >> Me no likey.

>> It's... no, it's holding, though.

>> Look, I'm popping popcorn!

( laughter ) ( cracking noise ) >> Ah!

I don't like that sound.

>> Did it just give way?

>> Uh... >> We can just cut, like, all these little pieces sticking out... >> Sure.

>> ...and then just kind of, like, caulk that too.

>> Yeah, all right, well, we'll just keep going.

>> Perfect.

>> Cool!

>> Our progress so far is actually really amazing, and our best bet right now is to just get it in the water and see where we need to reinforce things and practice sailing, because it's a race.

I know Wes really wants to win the scholarship, but Annelise and I really want to beat Juan.

>> That is beautiful!

( growling ) >> Oh, my!

>> Ana, you keep caulking.

>> You guys almost got the whole thing put together.

>> Hey.

>> Yeah, dude.

>> Nice.

>> Yeah, we had to build another... another coffin, because it was two people.

>> So how are you holding the two hulls together?

>> Two-by-fours across.

>> Nice.

Well, keep up the progress.

In a little bit, there's going to be a sailing lesson so you guys know what to do when you're out there on the water, not just kind of floundering.

>> Cool.

>> Sweet.

Keep up the good work.

>> Thank you, Nate.

>> While someone waterproofs the other side of the boat, the other person is cutting up the foam to give it that extra buoyancy that we need.

So we can attach it and see how fast we can get this thing in the water.

♪♪ >> Hey, Green Team, this is Rosemary, your sailing instructor.

Rosemary, meet the Green Team.

>> Nice to meet you.

>> Guys, Rosemary is an extremely experienced sailor and very good instructor, so you are in good hands.

>> All right, Green Team, let's go.

One foot in, hop up, move to the front.

All right, so you can step to the front.

Sit down.

We're just going to go over some basics.

>> Ow!

>> Oh!

( laughter ) >> Oh, you whacked your head, all right.

You ready to go?

>> Yes.

All right, so you want the sail perpendicular to the wind, because you want to give the wind as much sail area to hit as possible.

>> I think we should throw this thing in the water, just to test out the stability.

>> All right.

( laughter ) >> Dude, this thing's stable, though, look.

>> All right, no.

None of that, none of that.

>> No, what about outriggers?

>> We need them.

>> Yeah.

>> Yeah, a bit.

( laughter ) >> Look at how much we're rocking.

>> We're going to have to zigzag upwind, so to do that we do something called tacking.

So you push the tiller towards the sail, you're going to turn the bow on the boat through the wind, the sail is going to flip sides so you're going to watch your heads, and once that main sail fills again, you straighten right out.

So what kind of boat are you guys building again?

>> Catamaran.

>> Tell me more about it?

All right, cool.

Don't flip it, that's my biggest advice.

( laughter ) >> And... all right, okay.

Okay, I want to get out of this.

Let's not talk about this in the water.

( screaming ) ( laughter ) Nate?

Where are you?

Nate?

( screaming ) >> Hey, Lindsey, there's so much more action on our Web site.

>> Yeah, behind-the-scenes stuff like our blogs.

>> Not to mention you can watch full episodes.

>> Play games and build cool projects.

>> Awesome.

Let's go to pbskidsgo.org.

>> Next time on Design Squad... >> Hoo-rah!

>> Will it be Wes or Juan who sails away with the victory?

( horn blowing ) ( screaming ) Captioned by Media Access Group at WGBH