Mesa, located in the Sonoran Desert, offers a variety of free activities:

For Kids:

1. Arizona Museum of Natural History: Free admission on certain days throughout the year.
2. i.d.e.a. Museum: Free admission on certain days and for Bank of America cardholders on the first weekend of each month.
3. Mesa Public Libraries: Free storytimes, workshops, and events for children.

For Adults:

1. Mesa Arts Center: Free admission to art galleries and many outdoor events.
2. Downtown Mesa: Free self-guided tours of public art and historic buildings.
3. Mesa Amphitheatre: Free concerts and events throughout the year.

For Both:

1. Usery Mountain Regional Park: Free entry for pedestrians and cyclists to enjoy hiking trails and nature programs.
2. Mesa Grande Cultural Park: Free admission to explore ancient Hohokam ruins.
3. Mesa Market Place Swap Meet: Free admission to browse hundreds of vendors (open Friday-Sunday).