I was on my bike constantly as a kid. It was a "mountain" bike (from K-mart), so if course I used it like that and went bombing down ravines without a helmet or telling anybody where I was going. Conveniently, some of these ravines overlooked the local yacht club and it was fun to sneak in there with my friends and look at the dead fish on the pier. Then there was the time I rode it to an arcade a couple miles from my house - on the interstate. Kinda surprised I made it to adulthood sometimes.
I stopped because I turned 16 and got to use the car. Didn't stop doing dumb stuff, but that's another story.
Started again because looking at some old pictures I realized I wasn't fat as a kid. Hmm!