Jet Age Monkeys. The St. Louis Zoo's 31st chimpanzee show is a mirth-ful, tuneful, hilarious parade of hijinks by the talented stars of the chimp family. As 'space cadets' and 'rock 'n roll' musicians, the simian stars will delight the eyes and ears. Trained chimps perform various stunts. One chimp roller skates over a ramp. The chimps ride in carnival-style rides (some of them looks like bumper cars shaped like rocket ships). Child in audience looks delighted, smiling, laughing. Two child spectators applaud while a third enjoys a treat. The chimps play fake instruments; one with "guitar" does a reasonably good Elvis impersonation considering he's a different species.