Your local library is a great resource for cheap or free summer fun. Not only is it exciting for the kids to explore and find "new" books, they usually have a schedule of fun kid-oriented events, as well as information about other local events in your area.
Our local library has storytime twice a week. They have "Lap Time" for the younger kids--stories, songs, dancing--and a story time for older kids, as well--more reading, less singing and dancing.
After story time we let the kids wander and pick a few books to check out.
Cheap. Easy. Fun.
Click HERE for more fun summer ideas!