Materials:
Layers of newspaper to cover work space
Large bowl or plastic container
1 cup cornstarch
½ cup of water
Food coloring (optional)
Instructions:
Pour 1 cup of cornstarch into plastic bowl or container. Slowly add ½ cup of water (add food coloring to water if making colored goo). Mix cornstarch and water with your hands. Add just enough water so that the cornstarch and water mix will flow very, very slowly.
Things to try:
- Pour it from hand to hand. If you go slowly, it will pour freely.
- Pick up a handful and squeeze it. Stop squeezing and it will drip through your fingers.
- Roll it into a ball. Then stop rolling. The goo will trickle away between your fingers.
- Bounce it!Smack it with a spoon. If you hit the mixture really hard, it might even break.
- Rest your fingers on the surface and let them sink down to the bottom of the bowl. Try to pull them out fast.What happens?
- Put a small plastic toy on the surface. Does it stay there or does it sink?
Store cornstarch goo in a Zip-loc baggie.
IMPORTANT: The cornstarch goo will not stay mixed indefinitely. Once the cornstarch has separated from the water and has formed solid clumps in the bottom of the storage bag, dispose of in the garbage. Never pour the mixture down the drain as it will clog the pipes.