I've seen videos of kids who look about 7 doing motox and have on these helmets that look hilarious because it makes them look like a bobblehead. but i do worry about the safety implications of such a big heavy helmet being supported by such undeveloped neck muscles and bones. Kali protectives have a theory (i dunno, its pretty logical, probably not a theory) that a thinner helmet produces less torque on your head/neck when it hits the deck, i think this could be a big issue for smaller younger riders. when helmet shopping take this into consideration, having something light, smooth (doesnt get caught on anything while sliding) and thin will make a massive difference how it handles the fall, there must be child specific lids out there that incorporate all this stuff, as the foam required to stop a a grown person's head safely will be like a rock when absorbing the energy of a 7yr old's head hitting the ground... good protective gear is expensive, and he'll probably outgrow it in about 15 minutes, but you only get one noggin, and it's worth taking care of.
