If a student designs a gear that doesn't mesh, they didn't waste $50 in plastic. They wasted 5 cents of cardboard. They cut a new gear in 10 minutes. This encourages rapid prototyping.
If a student designs a gear that doesn't mesh, they didn't waste $50 in plastic. They wasted 5 cents of cardboard. They cut a new gear in 10 minutes. This encourages rapid prototyping.