How can i make a wind powered car out of a milk container?

I have a scool milk container. How would I create a car? My teacher will have a box fan in the back to blow, but that will be the only energy pushing the car. The car must have a axile, its own wheels, it can't be sitting on top of another car. What can I do?
How can i make a wind powered car out of a milk container?
add wheels and a model plane propellor powered by an elastic band,.
How can i make a wind powered car out of a milk container?
make wheels.....make axles put a big *** sail on top of the car ....will work fine....if u need help do you tube video search i'm sure there are tons

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