Corn Starch Plastic

plasticDid you know that some plastic bags are biodegradable? Let's make some plastic!

What You Need

  • 1 tablespoon cornstarch
  • 2 drops corn oil
  • Ziploc bag
  • Water
  • Food coloring


What You Do

  1. Place one tablespoon of cornstarch in a plastic Ziploc Bag.
  2. Add two drops of corn oil.
  3. Add one tablespoon of water.
  4. Mix the cornstarch, corn oil and water in the plastic bag by rubbing the outside of the bag with your fingers.
  5. Add two drops of food coloring and mix again.
  6. Place the bag in a microwave on high for 20-25 seconds.
  7. DO NOT completely seal the bag. Be careful!!! It is hot.

What Happens...?

  • How is your plastic like and unlike others? How is it like and unlike a plastic bag?
  • What happens to your plastic when you roll it into a ball?
  • What happens when it get wet?
  • What could you make with this plastic? What could you not make?

The project above was part of the Cookin' Up Science program.