Cheap Things To Do

I've been thinking of cheap things to do for fun this summer with Anna. Today I walked down to the waterfront with Anna until Paul got off from work. That was about a twenty-ish minute walk downhill with three hours at the beach. Hopefully that means Anna will sleep well tonight. Long story short, how can I entertain Anna this summer on a reallllllllllllllly tight budget? She gets so bored and ought to be in preschool. She's social and needs a lot of that socialization. So I guess we'll spend a lot of time at parks, the beach, and the McDonald's playplace. My mother in law gave me a nice list of things to do, so I might try them out. If you read this post, do you have any ideas? THING CHEAP OR FREE!!! ;)