Pros & Cons:
Pros-
- A lot of potential energy (rubber band)
- Friction in wheels (ridges on the bottle cap)
- Sturdy (Nails to keep in place)
- Lightweight (Styrofoam)
Cons-
- Rubber Band could snap
- Steer off course (ridges in cap)
- Styrofoam is easily breakable (not durable)
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