Therefore, in my childhood I spent years with opening things, look into them to see how they work, time meassurement, even with calculating stuff. Easy computations, of course. Though, I'm a lil proud that I figured out the relation between time, distance and velocity by myself at the age of about 7 or 8 years.
To bad my mother stopped all the fun I had, when she once found me sitting on the floor in my room, surrounded by several parts of my brandnew VCR. But, it was worth it xD