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.
Get your garden started early by planting your seeds in eggshells indoors before the weather permits outdoor growth. There are several reasons why eggshells are the perfect pot for this, but the bigge (How To Make Good Soil)
Defending Jacob is by far one of the best books I've read. A GREAT list of books that are impossible to put down! If you want a book that will keep you up reading until WAAAY too late, this list is perfect! Tons of great suggestions.