Great list for Outdoor Summer Fun. Some new and amazing ideas I haven't seen yet to keep kids busy this summer. Worth a look for the links alone! 30 out of the box ideas (and awesome links to support you in doing them.
Fourth of July Crafts for Kids: Flour Lawn Stars. Cut out star stencil, sprinkle grass with water (to make the flour stick) and then sprinkle with flour. This idea also works for Canada's July Birthday. Just substitute the star for a Maple Leaf.