200 S. Sixth Ave.
If you were stocking the world's greatest playhouse, what would you include? Tunnels to crawl through? A police motorcycle? Super-cool vacuum system so you could shoot soft balls all around the room? A train or two? Lots of arts and crafts? A safe space for the rugrats? A playground? A cool spot to throw a birthday party? The Tucson Children's Museum has all this and more, along with an affiliate branch in Oro Valley.
Runners up:
2. Mr. Nature's Music Garden
3. Illusionist Michael Howell