Children's Museum Oro Valley is a satellite location of Children's Museum Tucson specially sized for kids 0-5. The museum provides fun, hands-on experiences for children with an early childhood education focus designed to stimulate curiosity motivate learning through play. Nonprofit. Open Tues.-Fri. 9 a.m. to 4 p.m. and Sat. & Sun. 10 a.m. to 4 p.m. $6 for adults and children; under 12 months are free.