... it's got Lollapalooza. Although Kidzapalooza's website is mum, Lollapalooza does list a few children's musicians, including Justin Roberts, Candy Band, the Q Brothers, Peter DiStefano, and Chicago's much-revered Ella Jenkins. More are certainly on the way.
Oh, and if you don't like those artists, there might be a few others of interest in the main lineup. You know, like 30 or 40.
Lollapalooza is scheduled for August 4-6, 2006, in Chicago's Grant Park.