Kidzapalooza stage at Lollapalooza in Chicago's Grant Park

Women push strollers through the crowd at Lollapalooza in Chicago's Grant Park on Sunday, Aug. 3, 2008.

A member of Brickheadz break dances at Kidzapalooza, an entire area devoted to kids, at the Lollapalloza music festival on Saturday, Aug. 2, 2008, in Chicago.

Unidentified music fans make their way through the crowd at Lollapalooza in Chicago's Grant Park on Sunday, Aug. 3, 2008.

Lollapalooza founder, Perry Farrell, left, and Slash perform on the Kidzapalooza stage at Lollapalooza in Chicago's Grant Park on Sunday, Aug. 3, 2008