Creative and fun for all ages! This place is entertaining for everyone! I took my 4-year-old niece and we had a blast.
The entry fee is $9 for everyone. Like others have mentioned, that is a steep price especially for family members that don't interact in the activities, but go with the family. Some of the public libraries have a deal worked out with the museum to give out ticket packages for a small fee or for free. Check with your local branch for more information (this is how we got in without paying). Parking is free and they have their own private lot.
There are three levels of creative, engaging activities and a gigantic atrium of fun being built. The third floor was my niece's favorite because she could bike ride through a little "car wash." I probably watched her for a good 30 minutes going 'round and 'round.
On the second floor there is an art room. It closes before the rest of the place, so if you want to do crafts you should go to this section first.
There is even an area for kids 3 and under. My niece was sad that she was a year older this time around and couldn't go in there. Her sadness was quickly alleviated because just down the way she could play "grocery store."
I can't name all that they have to offer because that would make a long review. My favorite was that this place caters to every person's method of play and interaction; there are no limits to engaging in play and learning. Go, have fun, and enjoy imaginations at play!