I'm finishing up a custom Radio Flyer (need some 10.5x4.5-6 tires if you have some used ones laying around) and am getting started on a electric motor powered pedal car conversion. Yes, these are really for him.. I promise.

Looking down the road a bit. How young did some of you or your kiddos start out in karting? What classes and equipment? Obviously I have several years to go but I figured I better start learning now.
And then there's the junior dragsters and 50cc dirt bikes...and and and. I'm not sure who's gonna be having more fun, me or him.