How to keep a child busy for hours in the summer: DIY: Giant Ice Cube Awesomeness - filled with plastic animals, dinos, and such. And I'm sure you could put in food dye before its frozen to color it like the ice block in the photo.
101 Summer Activities for Kids - Summer Survival Cheat Sheet for Moms. Since I plan on taking a leave of absence this summer for our kids, I will be using this! This is for kids but there's a lot for adults too!
Ultimate kids summer activities lists and bored Jar lists. Make sure you never hear the words "I'm Bored" again! Empower your children to learn to occupy themselves with this ultimate selection of summer activities.