Go, go, go, go, go, yay!

I'm Nate from Design Squad and I'm here with: All of us are designing different balloon cars.

It's got a carton for a body, a half a plastic cup, four foam balls for wheels.

I think big DVD wheels will roll really easy.

Go!

NATE: When we release the balloon... (laughing) the rubber on the balloon squeezes the air out... (squeaking) which makes the balloon go...

It goes everywhere and it's crazy.

NATE: Now we're going to add a straw, because what it does is it makes the balloon go from going in a crazy direction... to a straight direction.

The propulsion technology we're using here is a lot like a jet or a rocket.

When the balloon squeezes air out the nozzle, it makes thrust in the opposite direction that makes the balloon and the car want to go that way.

ANNA: Racers ready.

(panting) On your marks, get set... go!

NATE: I just can't get mine to go straight.

DESI: I don't really think it was because it would go like that.

I think it was because it would go like that.

NATE: I think you might be onto something.

This side to side motion made it not go straight.

So I took this front axle, and I changed its angle just a little bit so hopefully it corrected it and now it goes straight.

A.J., I challenge you!

Racers, get your engines pumped!

Go!

(yells) Oh, now they're both going.

Good race.

Go.

Go, go, go, go, go!

Yay!

I won!

I have an idea of how we can scale this up a little bit.

What I've got here is a fire extinguisher attached to a tricycle.

Balloon car.

But with a little more pressure involved.

So let's try this out.

Go!

NATE: Now, the balloon cars used a jet of air to move.

There's lots of other things around that use jets of air: a fire extinguisher, a jet pack and a jet.

Whoo!

Don't try this at home.

Just make a balloon car at home.

(kids cheering) NATE: Instructions to build your own balloon car are on the Design Squad website.