My kids love the Tucson Children's Museum. We could spend the entire day there...and we have! Bring a picnic lunch to eat outside in the courtyard. Don't forget your camera! There are alot of cute photo opportunities. There are activities for all ages. There is a baby/toddler room with large stuffed blocks and a puppet theater. My kids love the animatronic dinosaurs, the Big Mouth, and the submarine. Check the website out for special programs. Also, if you go alot, there is a great annual membership program. Bring change for the parking meters!