How to Make Oobleck

Stuck inside? Try this fun science activity! WARNING: Making Oobleck is messy but fun!

Oobleck is a non-Newtonian fluid. What does that mean? It becomes solid under pressure and flows like a liquid without pressure! This makes it very fascinating to play with!

How to Make Oobleck:


  • Measuring Cup
  • Bowl
  • Spoon


  • 2 cups of cornstarch
  • 1 cup of water
  • Food Coloring (Optional)


  • In a bowl, mix 2 cups of cornstarch with 1 cup of water. Mix the water and cornstarch until your oobleck is formed.
  • Optional: If you would like your oobleck to have a color, add your food coloring to your water before you mix it with the cornstarch.
  • If you find that your oobleck mixture is too watery, add a little more cornstarch. If you find your oobleck mixture is not liquid-y enough, add a little more water. You may need to experiment a bit to find the right consistency.

NOTE: This is not like slime. You will need to keep the oobleck over a bowl, plate, or container since it goes back and forth between solid and liquid form.

Have fun!

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