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.
This DIY acorn marble necklace is an easy nature craft idea for kids and adults. They are made with natural acorn caps and make a gorgeous piece of handmade jewelry when worn as a necklace. They also make wonderful window decorations.
What a great idea. Make your own I SPY game with a VOSS water bottle. You fill it with rice and drop in little things to hide and then make a list of everything in the bottle for the kiddos to find. This is a great travel activity.