Materials 1 cup sand tbsp cornstarch 1 tsp dish soap water (as needed) Optional* Food coloring Directions Step In a bowl, mix fine sand and cornstarch together. Step Add dish soap and water, and combine thoroughly until well mixed. Step Add f
Clothespin Math on a clothes hanger! Easy to make, and self explanatory. I'm thinking a wire clothes hanger would work better, so the clothes pins are easy to slide back and forth (almost like an abacus).