We've taken our daughter here twice and she's had a blast both times.
We came first for the Warner Bros exhibit and then for the Things That Fly exhibit. Now she is itching to go to the Extreme Animals exhibit... and I am planning to take her next week!
This museum is CONSIDERABLY smaller than the Children's Museum of Phoenix. It's more of a hands-on, creativity-inspiring building with exhibits and crafts in just a couple areas.
You could do the whole museum in 15 minutes, but we've spent 2+ hours here and have had trouble pulling our daughter away.
This museum is best for kids aged 2-6 or maybe 7. I would think that much older kids would be bored silly.
Still, it is a great museum and it's only $7 for admission. You can usually find coupons online if you don't make it the first Sunday of the month.
And the best part is that you're only a stone's throw away from Urban Picnic (highly recommend)!