More than 250 interactive science and technology exhibits, including a light and optics gallery, a full-size ambulance, and the Measure Up health station. Sciencepalooza demonstrations during first weekend most months (with exceptions near major holidays), and other Super Science demos other weekends. New and traveling exhibitions, preschool gallery, weekend and summer classes, birthday parties, camp-ins, outreach programs, distance learning, and volunteer opportunities. Mon.-Sat. 10 a.m.-5 p.m., Sun. noon-5 p.m. Closed major holidays. Admission $8. Children under age 2 free.