We will definitely return on days when we need to be inside. Educational and very child friendly. The website does not do it justice to show how kids as young as toddlers can really enjoy themselves here. A bit pricey for entrance but there were 3 levels of things to enjoy and our kids (ages 4 and 1 1/2) could have stayed all day! Friendly staff as well. Super fun for everyone was the 'weather theater'. I don't know if that is a permanent exhibit but awesome how you can stand in the theater space and actually physically feel the different storms!! Our 4 year old enjoyed a 'lecture' on sea stars and actively participated. We went on a Saturday afternoon and it was not very crowded. Lot's of hands on stuff as well. Would recommend to people traveling to the Phoenix area. The building itself is a incredible to look at.