Well, when I was 4, I got a computer. My dad's friend brought over Wolfenstein 3D, and I played that since the second day I had the computer. Pwned everyone.
I'm sure that if BF was out back then, I woulda done the same with that game, too. lol.
Pretty sweet though, that he's only 2 years old. Just teach him not to TK and you'll be fine.