Come'on, you don't even have proper memory at that age. And then "to figure out how it worked", sure. We all dissected electronics when we were young, but that is hardly what I would call hacking. I don't get people's obbsession with bragging about how early they start. I guess it's since most hackers (pg, esr, Linus etc.) have these stories how early they start and somehow people think they need to do so to become great programmers (or hackers). It's not all bad though, I remember how motivating it was reading about those stories at young age.