This old-fashioned circus supplies a lot of bang for the buck. Animals from dogs to tigers and elephants. Beautiful girls in skimpy costumes. Daredevil athletes and trainers. Clowns willing to play the fool so we don't have to. The lead funnyman is Bello Nock, the handsome ringmaster's pesky doppelganger. Notable for his hair, which is gelled into amazing proportions, Nock is also an acrobat who braves the Whirling Vortex of Vertigo. The Aguilar Brothers add a hip-hop touch to their high-wire act, while the clowns play Chicago's Windy City Acrobats in a topsy-turvy game of b-ball. How can a show so packed with expert activity and high-tech spectacle cost so little? Of course, they get you on the popcorn. Through 11/13: Thu-Fri 7 PM, Sat 11:30 AM and 3:30 and 7:30 PM, Sun 12:30 and 4:30 PM. Allstate Arena, 6920 N. Mannheim, Rosemont, 847-635-6601 or 312-559-1212. + Then 11/15-11/20: Tue-Wed 7 PM, Thu-Fri 10:30 AM and 7 PM, Sat 11:30 AM and 3:30 and 7:30 PM, Sun 1 and 5 PM. Then 11/22-11/27: Tue-Wed 7 PM, Fri-Sat 11:30 AM and 3:30 and 7:30 PM, Sun 12:30 and 4:30 PM. United Center, 1901 W. Madison, 312-455-4500 or 312-559-1212. $10-$75.