The tentative showcase list for the 2007 South by Southwest Music Festival has been posted, and a brief perusal of the 1,300 (yes, you read that right) bands indicates at least 3 artists whose primary medium is kids' music: Daddy-A-Go-Go, Gustafer Yellowgold, and The Sippy Cups. The Sippy Cups' newsletter from Tuesday night indicated that they'd be headlining a free family concert at Auditorium Shores, so I wonder if the three bands are on a (pretty cool) triple bill...
Oh, and there might be a couple other bands in that list worth seeing.