Southern Arizona's interactive museum for children. Children's Museum Tucson provides fun, play-based, hands-on learning experiences for children and their families. Guided tours for groups available. Air-conditioned. Nonprofit. Open Monday 9 a.m.-7 p.m. (Memorial Day through Labor Day); Tues.-Fri. 9 a.m. to 5 p.m. and Sat. & Sun. 10 a.m. to 5 p.m. $9 for adults and children; under 12 months are free.