K.L.
A few fun places...
Makutu's Island, in Chandler is an indoor playground. The zoo is fun (a little hot though). There are also indoor jumping playgournds with inflatable bouncing areas (not sure names). Desert Breeze park has a train (not sure if it is running now) and also a water/ splash play area. McCormic Railroad park is also another train park (no water/play area).
Hope some of these ideas help.