1 cup of water

    1 to 2 cups of cornstarch

    Mixing bowl

    Food coloring (optional)


    Pour one cup of cornstarch into the mixing bowl, and dip your hands into it. Can you feel how smooth the powder is? It's made up of super-fine particles.

    Now pour the water in, mixing slowly as you go. Keep adding more water until the mixture becomes thick (and hardens when you tap on it). Add more cornstarch if it gets too runny, and more water if it becomes too thin.

    Add a few drops of food coloring if desired. (If you want to turn your Oobleck another color, it’s easier to add the coloring to the water before you mix it with the cornstarch.)

*Oobleck is non-toxic, but please use caution when doing any science activity. Be careful not to get it in your eyes, and wash your hands after handling the Oobleck. Wash Add plenty of extra water to the mixture before pouring it down the drain. Wipe up any dried cornstarch with a dry cloth before cleaning up any remaining residue with a damp sponge.