Just a short diary to illuminate, ellucidate, and inform that Saturday Sept. 28 is Smithsonian Magazine's annual free Museum Day event! Go to the site and you can download a ticket for one and a guest, for free admission to a participating museum near you.
If you live in the Phoenix area, I recommend the Heard Museum of American Indian Art and History. It's in a beautiful Spanish Adobe style building and has a great selection, including a special Georgia O'Keeffe in New Mexico exhibit opening that day.
Go enjoy and support a local museum, and get your learn on!