I got my first bike at 5yrs old for chrissy. It had training wheels, & my folks pretty much left everything well enough alone until I actually took them off myself when I was 7yrs old.
Living in the 'burbs, riding occurred mostly from the end of the driveway to the next block & sometimes when I went out with my older brother, to the back paddocks under the high voltage power-lines where motorbike riders had tracks.
Sure there's nothing remarkable about this, but I reckon I turned out pretty much alright.
Just a bike & a place to ride.