I just bought some goodies for his 40 MPH R/C car today, and he's been asking for a racing go-kart. I believe that answer is yes.
He's 7, and getting damn big. Currently says he wants to be an engineer so he can work on airplanes like his dad. Daughter is 4, I'm dreading the teen years already. Youngest is 14 months, he's already pointing at airplanes and getting excited so hopefully I've brainwashed him as well.