The joke goes something like this: Little Johnny proclaims that when he grows up, he wants to be a drummer. "But darling," his mummy says, "You can't do both!" Though he might not garner the approval of his mother, that aspiring tyke would find plenty to bang about at Rupp's Drums, where owner and legendary skinsman Bob Rupp sells tiny Ts for future masters of the snare, bass and kick. Bearing slogans such as "Will Drum for Food," the itty-bitty outfits are an early-childhood introduction to drummer pride; Rupp's also carries drum kits for kids who are ready to trade training wheels for tom-toms. It's a beat-iful thing.