This time we had the perfect archiological site at our post-construction house. The dollar store had these (all-one-piece-perfect for 4-yr-olds) dinosaur skeletons. I buried them and E and C uncovered them with their friends. Then they buried them again, then uncovered them again, and again and again. OK I admit kids and dirt go together like Saturday morning and pancakes, but this activity was a big success!