Supplies needed:
- 2 cups of cornstarch
- 1 cup of water
- A mixing bowl
- Food coloring (optional)
Steps:
1. Measure out the amounts of water and cornstarch you would like to use. Typically you will want to use a 2 to 1 ratio for the oobleck mix. We used 2 cups of cornstarch mixed with 1 cup of water.
2. If you would like to use some food coloring, mix a few drops into the water and stir it in.
3. Pour the cornstarch into the container or tray your kids will use to play with the oobleck in.
4. Pour the water slowly on top of the cornstarch.
5. Stir the mixture with a spoon for as long as you can. It will become hard to stir and you will probably need to finish mixing with your hands. You will know it is ready when it forms into a thick, gooey substance that feels solid when you press it with your fingers but flows like a liquid when you release the pressure. It will take about 5 minutes to mix.
Tip: If the Oobleck is too runny, you can add more cornstarch to thicken it. If it is too thick, you can add more water to thin it out. Don’t add too much at once, just add a little bit at a time.
Once your Oobleck is the right consistency, you can start exploring its unique properties. Try slowly dipping your fingers into the Oobleck and feel how it behaves like a liquid. Then, quickly move your fingers through the Oobleck and feel how it becomes solid. You can also try dropping a small object, such as a toy, into the Oobleck. Does it sit on top or sink to the bottom?