Here's another fun project from Family Fun Magazine:
Spread a smooth layer of shaving cream on a rimmed baking sheet (about 1/2 inch thick). Drip drops of food coloring on the shaving cream and swirl them around (we used a craft stick). Lay a piece of cardstock on the cream and press lightly. Lift it up and use a squeegee to remove the shaving cream. You're left with a colorful, marbled creation!
Landon loves this activity and will make several paintings in one sitting. It's definitely an outdoor activity, so do it now before the weather gets too cool!