The Upton Town Library will launch its summer reading program with a theatrical performance in the Nipmuc Regional High School courtyard Tuesday at 6 p.m. The Little Red Wagon traveling ensemble will present “Into the Grimm,” a show that weaves together fables and fairy tales. In case of rain, the event will move to the school auditorium. Admission is free; audience members are encouraged to bring a chair or blanket to sit on. For more information, call the library at 508-529-6272.