1 cup cornstarch
1/2 cup sugar
4 cups cold water
2 gallon-size ziplock bags
How to make
Over medium heat, combine the cornstarch, sugar, and water in a saucepan, stirring continuously.
Once the mixture begins to thicken, remove the pan from the heat and stir for another minute or so until it thickens to a pudding like consistency. Let it cool for 30 minutes.
Spoon the mixture into two bowls, stir a few drops of food coloring into each , then divide the colors between the ziplock bags. Seal the bags with duct tape and let your child mix and mash the colors (they’ll keep for up to a week). Always supervise your child during play.