We had a great first visit to the Children's Museum of Phoenix. We took our 2 yr old and infant. Our 2 yr old had a blast! She absolutely loved the 3rd level with the area for 3 and under and the market. Make sure to wear or take socks for the 3 and under area.
My biggest complaint was the "nursing snug". It was great to have an area to nurse my child, but I wish that it had a door on it and not a curtain. While I was in there for 20 minutes, I had a young child, 2 older children, a dad, and two different women all walk in wondering what was inside or the children wanted to play. It would be great if it had a door and was clearly marked!!