Anything that is not commercial or purchased. We can not use any type of pre-fabricated materials, and we are not allowed to go to home depot to purchase anything. The only wood we can use is on the base, not as support for the contraption.
I am having a hard time finding sturdy enough support...
I have to make a roller coaster for a golf ball. It has to be made out of recycled materials. This also means no materials for construction (but chicken wire is allowed) and no prefabricated materials (Legos, Kenex, etc)
2 loops, 2 hills. Each hill has to be 20 cm height change.
Can anyone...