Paint that grows. Mix 1 cup flour, 3 tsp baking powder, 1 tsp salt, and enough water to make consistency of pancake batter. Divide into 4 parts and put in snack size Ziploc baggies along with food coloring. Squish it around to mix up the colors. Rubber band like icing bag and snip tiny hole. Squeeze to paint and then pop paper in microwave for 30-45 seconds and watch the paint puff up and grow.
Buy a couple of roller shades from the store, decorate them, install under the kitchen table, and now the kids have a fort during the day :) When company comes over, just roll the shades up and no one will know the difference.
Put a tiny bit of toothpaste into a small cup, mix in one teaspoon baking soda plus one teaspoon of hydrogen peroxide, and half a teaspoon water. Thoroughly mix then brush your teeth for two minutes. Remember to do it once a week until you have reached the results you want. Once your teeth are good and white, limit yourself to using the whitening treatment once every month or two. - And to think I almost shelled out $40 at the store for some whitening strips!