Q&A for How to Make a Balloon Car

The water bottle one. This is because it has the best aerodynamic shape than the other two. It will also go faster and farther.

Try putting it on slippery surfaces like tiles and use rubber wheels. Avoid making your car too heavy. The lighter it is, the more easily it can move.

Balloons that hold helium are thicker and can hold more air than ones meant for oxygen. Look for balloons specifically labeled for helium.

The 3rd, because it is more aerodynamic in shape and does not weigh a lot, so it can go farther and faster.

Make sure it is taped or attached properly and near the top of the car, so that the balloon is not able to touch the ground.

It sends the car along the ground with motion. This is called wind power and it helps to propel the car forward.

If you put it in the front, your car is going to go backward.

It depends on the size of the balloon and the type of motor you use. A smaller balloon or motor will carry less weight.

It's up to you and how you decide to build it, but the most it can take is 20 minutes, so 20 minutes or less!!

Smart Water bottle caps work great!

40 - 60 centimeters.

Just put glue then three pieces of tape over it so it will hold the car steady.

You can use lego wheels or CDs or rubber wheels from a toy car. You could even use bottle caps.

Use a DC motor, then attach a small fan. Glue the battery and the DC motor at the end of the bottle and attach the DC motor to the battery.

You can use Lego wheels or even skateboard wheels with the bearings still on.

Any type of balloon except for the long circus-style type is okay.

You can attach your cars to a string suspended above the ground. This is good for comparing different cars because the distance the cars move down a straight string is more accurately measured than the distance across the ground on wheels that might not steer straight.

Yes, all of these are easy to create, because the materials are commonly found in your home. They work pretty well if you follow the instructions correctly.

It depends on what you are using. It should definitely be longer than the side you are taping it on. You want to make sure there isn't excessive straw, so it really should be the cardboard's length plus the wheels' width times two.

Yes, this could be a fun activity for kids.

You can get a hot glue gun from just about any craft store for about £1.50/£2.00.

Just use scissors to cut the straw.

You can use some hot glue or super glue to stop the wheels from falling off.

Well, when making the car if you want the wheels to move then you should have the straw, because that enables the wheels to move and makes it travel farther.

Follow Technique #1, but instead of the cardboard, use a paper plate.

Your best bet is a water bottle, because it is aerodynamic.

In order to make it go faster, you need to make the car as lightweight and aerodynamic as possible.

The bottle one, because it is more aerodynamic in shape and weighs less.

It's wobbling because of how thin the CDs are. Try attaching them to a bottle cap and attaching another disc to the other end of the cap. This should help with the instability, and even though it adds some weight, the two CDs will have less traction than the one bottle cap.

The water bottle one, as it has more of an aerodynamic shape and it can go faster and farther.