vehicle 4 science and i want to maek a balloon propelled car , but idk how.this is for newtons 3rd law?

ok, so im in 8th grade and in science and we are studying Newton's 3 laws. we are supposed to make a vehicle (that looks like a vehicle) and it must move 1.2 meters. we may not use batteries anything electric , kits or the force of gravity. so i decided to make a balloon propelled car, but im not exactly sure how... show more ok, so im in 8th grade and in science and we are studying Newton's 3 laws. we are supposed to make a vehicle (that looks like a vehicle) and it must move 1.2 meters. we may not use batteries anything electric , kits or the force of gravity. so i decided to make a balloon propelled car, but im not exactly sure how to. where am i supposeto put the ballon?? arrrggghhhh i need help! (not mentally ;) ) by the way my projec is due on NOvember 7th 2008 soooo yea, help
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