You can kick it old skool activist with some Zapata bodysuits, or you can kick it new skool, with, um, New Skool baby clothes, designed by a Bay Area graffiti artist for your "extra hip kid." [those plain, old "hip kids" apparently being a dime a dozen these days.]
Anyway, the bodysuits and t-shirts and hoodies have various graf-related, clip art-y graphics, like a red wagonful of spray paint cans, or a penguin in front of a "chillin'" tag, or my favorite, the line drawing of a pair of DJ-style headphones resting on the shirt's collar.
Bodysuits are $24 online via paypal, or they're available in person at precious few retail outlets on the coasts. Sorry, flyovers! [shopnewskool.com]