Wonderful (WONDER-FULL!) place for kids and adults alike. I don't mind paying full/adult admission for this place as there is just as much to do/learn/experience as with the child's experience.
I'm so glad I waited to review this place until today (we went Friday, July 13th) because I remember my husband and I thinking that, aside from the wonderful Body Works and Grossology temporary exhibits, some major improvements, additions and renovations were in order... And I was SO impressed with all the nice changes since we last visited with our kids (then age 3 and 7; now 6 and 10) a few years ago.
ONE CAVEAT: If you live in the Phoenix Area, definitely opt for the membership, as just TWO VISITS make it worth the cost. (3 or 4 visits, which is completely reasonable just for the summertime will make the price even more attractive).
Another complaint I have is the check-in time for non-members (20 minutes on line just to step up to a cashier; all the while my kids had to endure the taunting view of the outdoor water/balls exhibit and I had to subsequently endure, "Why is it taking so long?!").
Other than that, this place ROCKS!
We look forward to going back and buying the family membership!