We knew how to have fun and be creative when we were kids Peter. Once had a gokart with a Villiers 250 (I think) with a centrifugal clutch. used to drive it everywhere,- even drove up to my mates parents farm about 5km away and drove all over the paddocks. Never got stopped by the fuzz, but stayed on the footpath most of the way. Heaps of fun.
Made a pedal car for my son 26 yrs ago, using re machined 10 speed gears, rose jointed steering, adjustable seat and gearing, as well as adjustable steering wheel (up and down, in and out) etc. Had modified wheelbarrow 'mag' wheels, Hillman Avenger tail light inners for headlights etc. Took it to Fiji with us for 2 1/2 yrs and brought it back. He had a lot of fun with it.
I don't think many kids these days are as practical as we all were, as everything is handed to them. Their first cars are worth more than our parents houses in a lot of cases!