That's so cool you have him help out already. I think it gives kids a sense of belonging that they can help out. It also helps develop a curiosity for fixing things. If you just do everything for them, they can't learn how to do thing for themselves and it will stunt them later on. Good to see your son is getting started early. And hopefully the light actually works. I suppose you could have him step on the brake pedal while you look at the lights. :)