Ever wonder what to do with all those paper towel or toilet paper rolls? Don't throw them away, make a maze for the kids! Recreate this craft from A Happy Wanderer and cut the cardboard cylinders in half and glue them cascading down the long side of a large cardboard box. Let dry for a few hours. Sit up against a wall for support and let the kids drop balls, cars (or really, anything that rolls!) down the path. It'll keep them entertained for hours, and keep all those toys off the floor -- at least temporarily.