3 tbsp. sugar
Dish detergent
1/2 c. cornstarch
4 plastic or paper cups
2 c. cold water
Med. saucepan

Mix the sugar and cornstarch together in the saucepan. Then add the water and mix a little more. Ask a grown-up to help here. Cook over medium heat, stirring all the time. The mixture should start to boil, then thicken. Takes about 5 minutes.

Remove from the stove, cool, and pour into the plastic or paper cups. Be careful with the food coloring since it can stain, but add a little of it to each cup and then a drop of detergent. Done!