A round up of cheap/free things to do this month, thanks to the AZ Republic:
Free Adult's Night Out - AZ Science Center (I've always wanted to do this). This month - the science of beer. Yum.
Free Fishing - attend the first Greer Family Fishing Derby on May 5th.
See a museum for FREE - if you have a BofA or Merrill Lynch credit card or debit card, you can visit one of three Valley museums for free Saturday and Sunday May 5-6. MIM, Phoenix Art Museum and Children's Museum of Phoenix are on the list. Limit one per cardholder.
National Public Gardens Day is May 11 - get in free to 100 participating gardens nationwide if you have a voucher. Ours include Desert Botantical Garden, Boyce Thompson Arboretum and Arizona-Sonora Desert Museum.