I almost forgot that it is the first weekend of the month. If you are a cardholder with Bank America they offer free admission to several Museums and Zoos nationwide. I believe the Phoenix Zoo is one of them.
Also, don't forget the that tonight is Target Free First Friday Night at Children's Museum of Phoenix. The Museum is open FREE from 6pm-10pm so get there early and play all night. Check out their events calendar, the museum has several really cool events planned for this month.
Check out Judy's Phoenix Blog article for 7 Free things to do, many are tomorrow. Thanks Judy!
Lastly don't forget to check out Free Weekend posts at The Freebie Blogger!