Going Pro

I received my first income as a musician today. While waiting for my six year old's piano lesson to finish, I sat in a shady spot outside the music store and practiced trumpet. After my second song (Misty) a family out for a bike ride came over and the Dad insisted on giving me some money. I tried to talk him out of it, but he insisted, saying it was one of his favorite songs.

Two bucks, cold hard cash, without even trying. Do I have to declare this on my 2010 taxes?