Animatronic dinosaurs, a planetarium, two IMAX theaters, a Tropical Butterfly House, a Laser Done, and heaps of interactive exhibits spread over six acres make the Pacific Science Center one of the better places for kids to spend a long rainy afternoon — or a sunny one at that. Prices are offered somewhat a la carte, with admission to the regular exhibits and IMAX movies available separate or as a combined ticket; full pricing information is available on their Web site.