How To Make A Balloon Powered Car

Materials
a small, light cardboard box
a balloon
2 skewers
3 straws
4 bottle tops
a rubber band
scissors
stickytape

Step 1
Stick 1 straw about 2cm in from the edge of your box on either side. Make sure they are stable.

Step 2
Thread your skewers through your straws carefully.

Step 3
Your 4 bottle tops should have a little hole in the center of them already  if they dont carefully make one.
Push a bottle top on the end of the skewer so the flat part of it faces the cardboard.Do the same with the other 3(Carefull not to hurt yourself!)

Step 4
Cut your last straw 8cm and put the mouth piece of the  balloon on the end of the straw.

Step 5
Tie your rubberband around the balloon where it meets your straw so when you blow the other end of the straw your balloon will blow up.


Step 6
Blow your balloon up and let it go!!!!!!
3
2
1
Balloon car away!!!!!!!!!!!!