Soooooo, the assignment is to make a balloon powered car, and given that I'm a rediculous over-achiever, I tried to make something cool. Unfortunately, I thought my car was light enough to be powered by a balloon (it's made of bristol board), but it doesn't move at all.

Any suggestions on how to make something similarly awesome while still being able to move?

[Linked Image]

[Linked Image]

.talk nerdy to me.