Well my son made 4 cars. The chicken car which is a block of wood with wheels and many holes drilled with chicken feathers shoved in. A Godzilla car... Well shaped wood, sanded and stained with a Godzilla mounted. Anguirus car, same deal. And "chomper" which is 2 pieces of scrap wood, hinged together with archery bullet points as teeth so it can "bite" things. In testing, chicken car did the worst (surprise) with Godzilla and anguirus doing well, but chomper beat them by a hair every time, so he raced with chomper. It was a long five hours with him in 12 heats...against pretty well painted cars....and chomper won every single race. My kid is now the county derby champion.
Unfortunately that means at some point we have to drive to regional finals. And truth, I don't know if they will let chomper race. Because its teeth are archery points. Now if you don't know bows, bullet points are used for practicing with paper, cardboard, or foam targets. They are dull, and even if he slammed chompers teeth on your hand, worst case is a bruise, but technically they are associated with a bow and arrow, which is a weapon. We will see. Our county zero tolerance hasn't gotten insane. Like kids can still decorate their cupcakes with army men, and kids still own water guns, nerf guns etc. But the county I work in, army men are indeed on the banned list for cupcakes. Granted worst case Godzilla can probably sub (assuming monsters aren't zero tolerance too)
Well here is chopper
http://i.imgur.com/MLtTBtV.jpg
Yeah I still have to laugh about it beating all the beautifully shaped, sanded, and painted cars.
Congratulations to your son. Is this some sort of scouting event or is it independent of that?
Based on the photo, the "teeth" don't look all that pointy - although I understand about certain districts looking unfavorably on anything that may be (or have been or can be) a weapon.