When I was back at 2nd grade we used to drive a 30-year-old car which had nothing in the internal part of it, we were using screwdrivers as accelerator and brakes, surprisingly it worked. Also it had no steering wheel or seats, so we broke in some old car and just dismantled it ^^. (That car was parked at the same place for a couple of years and all of it's windows were busted, so no guilt for us!)
Was the best memory I had in my childhood
. Surprisingly we didn't even smash into anything and everything went smooth.