Sandcastles Are Forever
["1 c. cornstarch", "2 c. sifted sand", "1 1/2 c. cold water"]
["Mix together in old pan and cook 5 to 10 minutes over medium heat, stirring constantly until very thick and holds shape.", "Put on plate and cover with damp cloth until cool enough to handle. Knead well.", "Store tightly covered.", "Use like clay."]
["cornstarch", "cold water"]