How can I make a top body for a soapbox car without spending too much?

There's a soapbox derby in July and I wanna make a car. Plywood floorboard is no problem but I don't know about 3D shapes. Any suggestions on something a kid (12) could make? Add other suggestions if you want.

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orksecurity8 years ago
Paper mache', possibly over a wire or wood frame?
ANDY! (author)  orksecurity8 years ago
How would I make the mold?
ANDY! (author)  orksecurity8 years ago
I never thought of that!
tinker2346 years ago
wait wrong image blast
tinker2346 years ago
and good luck
tinker2346 years ago
wire but here is a good shape is the tringle it slices thourgh air qukily try a dimanod shape
skunkbait8 years ago
You could use bamboo strips covered in canvas. It'd probably look crappy, but it'd be cheap, light and aerodynamic. Save your money for the best wheels and bearings you can afford.