I did the Science Center this last Saturday for the First time. Funny you should ask about it lol. I moved here from Seattle in 2005 and Seattle had a GREAT! Science Center so I was a bit disappointed in it but all in all it was a cute place to visit.
My first complaint about Phoenix Science Center is they charge extra for everything. You pay $9 to get in and then extra for Narnia, Grossology, and Planitarium and maybe a couple other things. we only did the basic $9 things.
The first floor has a lot of interactive things doing with the building of a house. There are play things and then things you can see touch and do relating to making your house better place. Then the next section was about the body. They had a wheelchair race you could do and let me tell you Wheel chair racers work hard!! Its on rollers so you dont go anywhere but it measures your speed and such. There are other things relating to the body.
Then up next level was things like puzzles and music and radio. I cant remember all of it now. There was an awesome exibit about the earth and weather. You stand in the middle and experience weather like lightning, earthquakes, extreeme heat and rain and tornado.
The top floor had something to do with energy. It was small and looked like still building there.
We got in with a coupon from the entertainment book. Parking cost us about $10 too in the garage across the street.
I saw a Childrens museum that was across the street from the science center said opening 2008 so maybe soon? Its in an old School so looks big. Dont go to the Childrens museum in Mesa. It was a waste of money and time. I took my grand kids last year and they have a section to play but only if your child is under 4. My grand daughter was 5 and way to small to enjoy the big stuff and to old to join her brother in the play area so we didnt stay there long. (Maybe an hour or so?)