Zebrahall.com's $135 Woodstock mini guitar, aimed at kids ages 6 and up, is 7 in. shorter than a standard-size guitar. It has six tunable metal strings (they also break like regular guitar strings, so parents, watch the sharp ends) and a built-in speaker-no amp required. Find it in Zebra Hall's new Music Room, along with panpipes, xylophones and Cha Cha Cha acoustic stilts.