I was 5 when I first started using a computer.
Apparently, in kindergarten, I didn't talk to anyone at lunch. If someone tried to strike up conversation, I just stared at them until they walked away. I was told this 18 years later, by someone who knew me SOLELY because of that. Also, that continued to be a trend of mine until half way through college.
When drawing, there were several occasions that I started while in a room full of people, and when I looked up, everyone was gone and an hour had passed.
My first best friend and I played by creating word puzzles.
I tried to saw my nose off with the metal part of a ruler. When my mother told me that I was dark because of spending time outside, I replied that it was actually because of the amount of chocolate cookies I ate. I rationalized that I spent more time eating cookies than being outside.
At 10, someone gave me a bunch of Magic cards during Latchkey. After gauging the gullibility of other kids, I promptly started charging them $1 to play a game with me. Unfortunately, my mom came in and put an end to it. I, of course, argued that the money was well-earned, as I provided a service that would otherwise be unavailable to them.
At some point, I realized that immense knowledge of mathematics, as well as enough physical ability to perform a task, could allow a person to any task perfectly. Having come to this conclusion, I stopped caring about math. In hindsight, I wish I hadn't. I could be a video game developer right now.