Well, not every kid is the same. There's young kids out there that can handle high horsepower with aplomb and race competitively, getting into motorsports at a young age. They are a small percentage of the population. Then there's the ones who lack the brain, body and fine motor skills needed for such feats. I think it's foolish to assume every kid is just like you were.
It's just humorous for us because we haven't seen Spindles on a working go kart yet and now he wants to "graduate" to a mini bike.