Riding a bike is one of the summertime joys of childhood. Yet for many youngsters and their parents, learning to ride a two-wheeler can be a very frustrating experience. To help children develop independent bike riding skills, the Barber National Institute is sponsoring a four-week learn-to-bike program. "Ready, Set, Ride!" will be held on Saturday, July 6, 13, 20 and 27 with sessions at 9 a.m. and 10:15 a.m. at the Warren YMCA, 212 Lexington Ave.