The Arizona Sciene Center is really an Amazing FUN place to spend the day. However if you have the money to spend. The total amount you will spend the whole day you are there (and seeing the whole museum will take all day) will add up and make this a pricey day out. Almost everything you do in the center is free...almost.
Once in the musuem you simply can not miss the planetarium presentation, oh yeah and that's an extra admission cost, but it's a presentation that you need to at least experience once, the kids will not only love it but wil llearn alot!
There is a small eatery with a taco bell/pizza hut where you can order lunch, but becareful as prices are kinda steep for a burrito in the center compared to a burrito outside the center.
There are hundreds of hand on exhibits for the kis to touch, run around, feel, and smell. they will have a blast so be prepared to stay all day! Not only will your kids learn but you will also, lesson learned? Bring more money.