how old where you when you first work on a car

We were riding Dirt Bikes and Go-carts out in the Country in Middle School, and they would break down. So I started cleaning Carbs. out, fixing chains and sprockets etc. Took the Head off a Briggs and Stratton to free a seized Piston. My Dad was great. He taught me to Change oil and Plugs as I watched him on the Cars. Got my Duster at 15, and the rest is History