You will need corn starch ,baking soda,water(cold)

1.put 3tbs of water in to a bowl
2. then put 3 ts of baking soda in the same bowl, put 3 tbs of corn starch in a bowl
4. mix them all together until not runny anymore
5.(if water once you mix it then add a little more cornstarch and baking soda

From Becky Lacey, age 13, indiana