1. Library
2. Culture Pass (free admission for 4 to valley museums-check it out at the public library get there early)
3. Lemonade stand with the kids (Peel three fat lemons. Cut them into smaller pieces. Drop the pieces into a blender with 1-1/2 cups of sugar and 1-1/2 cups of water. Use the blender to chop until coarse, then strain into a pitcher. Add ice cubes.
4. Set up a tent in the backyard, roast marshmallows and sing songs around the grill.
5. Visit valley swimming pools cost :$1.75 for kids and $3.50 for adults. Carson Jr. High has free breakfast and lunch for kids 18 years and younger. Stop by for lunch then head on over to the pool. See times and special events like family night at Taylor Pool every Monday night (whole family for $1)at http://mesaaz.gov/parksrec/timeout/pdf/aquatics.pdf
6. Build a Fort. Let the kids drape sheets and blankets over some tables, chairs, and piles of couch cushions for a few days, or round up some cardboard boxes from furniture or appliance stores and have the kids paint their houses with old paints or markers.
7.Picnic lunch at the park. Try one of the four east valley parks that have splash pads. For locations and info see http://www.azcentral.com/families/articles/0514gr-mombeat14Z12.html
8. Re-decorate or paint the kids rooms or the play room. The "oops" paint at Home depot is only $5 a gallon and check craigslist.com for free or cheap used furniture.
9. Have a Christmas in July. Have kids make presents or give them each a few bucks and hit the thrift store. Goodwill has half price day every other Saturday.
10. Go to the movies. AMC has summer movies every Wednesday for $1 at 10am http://www.amctheatres.com/smc/ and Harkins has a similar deal at: http://www.harkinstheatres.com/theatreDetails.aspx?theatreId=4539
Have a fun safe summer!