How to Train Your Dinosaur is not a sequel to the animated movie, but a popular new show at the S.B. Zoo (500 Niños Dr.). A seven-foot tall mechanical T. rex named Duncan is the star of this 15-minute production, which teaches kids about the special care our city’s zoo animals receive every day. Duncan will run, roar, blink—and even poop—for crowds three times a day, at 1, 2, and 3 p.m. every day ’til Labor Day (Mon., Sept. 5) at the S.B. Zoo’s Rolling Hills Theatre. The show is free with zoo admission. Call 963-5695 for more info.