I never wanted to grow up. :dunno:
I was quite happy to be making roads in the sand/dirt with my hotwheels... contemplating things that 5 year olds shouldn't be, like electrical relays, gated hoses for pumping water, diodes, worm drive gears... I guess maybe I wanted to be an inventer, or a problem solver of some sort.
But playing with hotwheels and crushing bugs was a lot more fun.