I'm going with Amanda just for the FREE PONY RIDES

Summer in Chinatown
On Sunday from 10am-8pm, drop by the annual Chinatown Summer Fair, featuring a Lion Dance processional, which starts at the Main Stage (23rd Street and Wentworth Avenue) at 1pm, Asian cultural entertainment, and a Music Stage (Wentworth Avenue and 24th Place) with performances on the hour. Families can also enjoy a number of children's activities, including free pony rides and a petting zoo as well as browse the arts and crafts vendors for authentic Chinese goodies. Admission is free.

Also that day from 2-4pm is the free cheerleading & drill team competition in Millenium Park Pritzker Pavilion as part of the Gay Games, which kicks off Saturday.