I usually don't like to double post but I wanted to make sure that you all know that there is so much going on in CU this weekend...and it might not rain on Saturday!
Check out the NG calendar as well as both park districts (Champaign; Urbana) for the weekened events!
My pick...the 17th Annual Kids' Building Fair on Sat. from 11am-4pm in the Orpheum's parking lot in downtown Champaign. This is a great event for the whole family...tons of hands-on activities. This year they are also offering Historic Building Walks of Downtown Champaign.
Also, if your kid is into theater, the Urbana Park District is holding auditions of the summer musical Suessical, the Musical on Saturday and Sunday. This is a great program for kids 9-18yo. Everyone who auditions receives a part. The cost is fairly low as well (a script and costume fee, but financial assistance is available). If you child is younger 6-9yo, they offer a junior performers program as well.