The Children's Museum of Phoenix is a large building with a lot of space offering more than one nursing mothers rooms, one on the 1st floor and one on the 3rd floor.
Mom Vicki wrote: "I love how they have sinks of different heights in the bathroom and a changing station in each one. On the third floor and first floor there are also nursing areas so you don’t have to nurse in the bathrooms!"
The museum stated:
"You may nurse your baby anywhere in the Museum. There is an abundance of seating throughout the exhibit spaces. If you prefer a more private environment, there is a Nursing Snug in the 3rd floor Book Loft area."
The 3rd floor of the museum have a family friendly restrooms with extra baby changing table and on the first floor near the Place for Threes & Younger.