[bright music] - Hi everyone, my name is Krystal and I'm here at the Brooklyn Preschool of Science with my friend Sahil.

Sahil, can you please say hello?

- Hello.

- How are you today?

- Good.

- You're good?

Awesome.

I'm glad to hear that.

Okay Sahil, I have this coin here in my hands.

I need you to do me a favor.

- It looks like money.

- It's a quarter.

Yes.

I need you to help me.

- Okay.

- I'm gonna put this coin in your hand and I need you to squeeze it really, really hard and please change the shape.

Right now it's a circle.

Can you change the shape for me?

Any other shape.

Go ahead Sahil.

Squeeze really, really hard.

You can use both hands.

Yes, yes.

Thank you.

Now, let's see.

It went from a circle to, oh.

It's still a circle.

Can you try that one more time?

- Yeah.

- Okay.

Put your hand out like this.

I'm gonna put it in your hands.

Squeeze, squeeze, squeeze, squeeze, squeeze.

Squeeze, squeeze, squeeze, squeeze, squeeze.

Okay, now let's see what shape, let's see.

Is it a square, triangle?

- It's still- - It's still a circle.

- Yeah.

- Do you know why?

- Yeah.

- Because this is a solid.

- Solid.

- Yeah.

Can you please say "Hello solid"?

- Hello.

- Say, "Solids like to keep their shape."

- Solids like to keep their shape.

- Good job.

Okay, so let's see.

So this is our solid.

What's in this cup here?

- Water.

- Water.

Good job.

Water is a liquid.

- A liquid?

- Yeah, look.

You see.

If I take the water and I pour it on my hands like this, it takes the shape of my hand.

- Yeah.

- If I take the water, I pour it back into the cup like that, it takes the shape of the... - Cup.

- Of the cup.

See liquids, they change their shape.

There's no fixed shape.

So I'm going to now- - And we have our tape.

- Yes.

So for our first activity, okay, I'm gonna give you a cup filled with some liquid, okay?

And I'm also going to give you your very own solid here, okay?

So friends at home, this is sodium bicarbonate, and you can get this at any pharmacy or grocery store.

And also please do this experiment with a trusted adult at home.

So Sahil, I would like you to take your solid and then you're gonna drop it into the cup with the liquid.

And I want you to watch and see what happens, okay?

And then I want you to tell me what happens.

But before we do that, can you make a prediction?

A really smart guess.

What do you think's gonna happen?

- I don't know.

- Take a guess.

What do you think's gonna happen?

When we drop this, this solid into the liquid, what do you think could happen?

- The water and this will be there together.

- They'll be together.

Okay.

Will something happen to the water, you think?

- Yeah.

- What do you think's gonna happen?

- I'll guess.

- Do you wanna try and see what's gonna happen?

- Yeah.

- Okay.

All right.

So friends at home, let's count together.

When I get to one, we're gonna count down from three to one.

When I get to one, please drop your solid into your liquid and watch and see what happens, okay?

- Okay.

- Ready?

Let's count together.

- [Both] Three, two, one.

- Drop it in.

Look.

Look inside.

Look in the cup.

What do you see?

What's happening?

- It's floating around.

- It's floating around.

Here, take your hand and put it over the cup like that.

Do you feel anything?

Do you feel the water splashing?

- Yeah.

- Yes.

Look inside.

What are those circles, those round things that are coming up and popping?

- Little bubbles.

- Yeah, you see bubbles, right?

- Yeah.

- And what do you hear?

Can you listen to the sound?

What does it sound like?

Does it sound like the shower?

- It sounds like the shower.

- Yeah, right?

Like water running.

And Sahil?

- Yeah?

- So you took your solid, you dropped it into the liquid.

And now those bubbles, do you know what's inside of a bubble?

- Yeah.

- Gas.

- Gas.

- Yes, that's right.

You took your solid, dropped it into a liquid, and now the gas is floating around this because the bubbles have popped.

- Yeah.

- What do you think would happen, Sahil, if we did the same experiment, but what if we put a lid on the cup?

What if we trapped the gas inside?

What if the bubbles couldn't get out?

What would happen?

- Then they will pop everywhere.

- They'll pop inside the cup?

- Yeah.

- Okay.

Do you wanna try that experiment?

- Yeah.

- Yeah?

Okay.

So we'll move these materials to the side.

And so for the next activity, our friends at home, you'll need a film canister.

You see this here?

It's like a little mini cup, but it has a lid.

Let's just take the lid off.

Okay.

Here It goes.

You see?

It's this little mini cup.

This has the lid.

We're gonna need our sodium bicarbonate tablets and we're gonna need some water.

- Yeah.

Water.

- All right, so we are gonna do the same thing that we just did.

- Yes.

- We're gonna take this cup.

I'm going to add a little bit of liquid inside the cup.

And Sahil?

- Yeah?

- You hold onto that solid for me.

I'm going to now, when I count to three, Sahil, you're gonna put the solid inside here and then I'm going to place the lid on.

And we're gonna put it right here in the middle of the plate and we're gonna watch and see what happens.

Are you guys ready?

- Yeah!

- Okay.

One, two, drop it in.

Good job.

Now I put the lid on and flip it over.

Let's sit back, let's watch.

Let's see what's happening.

Let's do a countdown.

Ready?

- 10.

- 10.

What just happened?

Did that just explode?

- Yeah!

- Yes, you know the gas inside it said, "I'm out of here!"

- Why did it do that?

- We tried to trap the gas inside, but all of that pressure, it built up and now it's outside.

Do you wanna try it one more time?

- Yeah.

- Yeah?

Okay.

So look, I wanna show you something.

This is what we did, okay?

We have this template here.

You can just use paper, some crayons or markers, scissors.

You have your fins.

- Yeah.

- Right?

You have the cone that goes right on top.

And look, you can decorate your film canister.

Now it looks like a rocket, right?

- Yeah.

- Okay, we're gonna try that one more time.

- One more.

- So because it pops up like that, it's not a good idea to stay close, okay?

Please stand clear.

You're gonna step back.

And we're gonna do that again.

- Yeah.

- All right, let's go.

I'm gonna need your help, scientist.

I'm gonna open this again.

Can you please take the tablet for me?

There's your solid.

Here's some liquid.

Okey dokey.

All right.

Are you ready?

Drop it in.

Oop.

Put the lid on and let's do it again.

Ready?

- Yeah.

- [Both] 10, nine, eight, seven, six, five, four, three, two, one, blast off!

- [Sahil] Whoa!

- That was awesome!

- It went to Mr. Paul.

- It did.

Can you say, "Science is awesome"?

- Science is awesome!

- Alright.

Was that really cool?

- Yeah.

- Yes?

Okay.

Can we say goodbye to our friends at home?

- Bye-bye.

- See you soon.

Bye-bye.

- Bye-Bye.