Calming bottles - these sensory bottles are great for little ones to explore and for preschoolers to use during a cooling off period. Water bottles with small amount of water poured out. Glitter glue, loose glitter, jewels and superglue to seal cap.
Beautiful Reading Canopy by sewliberated: Made by sewing silk onto a circular hand quilting hoop which was suspended with hemp twine to a sling ring and then hung from a ceiling hook with fishing wire. Another square of white silk was reading canopy
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.