Kids shows, you can get if you use the I'm 13 years old thing as an angle, heck you can do nursing home shows too, that's what I was doing at about that age. They'll think it's "cute" and hire you. Just make sure you have enough material to do a 30-45 minute show. The nursing home shows are pretty easy to get too, just give'em a call and ask to speak to the director of activities and let'em know who you are and what you want to do and give them a low price, make'em an offer they can't refuse! As for kids shows, try advertising on local bulletin boards and maybe get the family to give you a hand in spreading the word. It's much tougher to get those because you have to wait for a party or something to come up. I'd print out some business cards too, they'll think it's all the "cuter".