How To Make Oobleck - Easy Recipe

Easy Recipe for Oobleck

Oobleck is one of the easiest types of slime you can make.
Oobleck is one of the easiest types of slime you can make. Gary S Chapman, Getty Images

Oobleck was the name given to a type of slime in a Dr. Seuss book that was capable of gumming up a whole kingdom. The oobleck that you can make for a science project isn't gummy, but it does have interesting properties of both solids and liquids. It normally behaves like a liquid or jelly, but if you squeeze it in your hand, it will seem like a solid.

Difficulty: Easy

Time Required: 10-15 minutes

Oobleck Ingredients

There's nothing complicated here, which is part of the charm of oobleck.

The ingredients are inexpensive and non-toxic.

  • Water
  • Corn starch
  • Food coloring (optional)

Let's Make Oobleck!

  1. Mix 1 part water with 1.5 to 2 parts corn starch. You may wish to start with one cup of water and one and a half cups of corn starch, then work in more corn starch if you want a more 'solid' oobleck. It will take about 10 minutes of mixing to get nice homogeneous oobleck.
  2. Mix in a few drops of food coloring if you want colored oobleck.

Tips for Great Oobleck

  1. Oobleck is a type of non-Newtonian fluid called a dilatant. It's viscosity changes according to the condition to which it is exposed.
  2. If you slowly lower your hand into oobleck, it will sink, but it is difficult to quickly remove your hand (without taking all the oobleck and its container with you).
  3. If you squeeze or punch the oobleck, the starch particles will not move out of the way quickly, so the oobleck will feel solid.
  4. Oobleck can be molded in a container, but when the mold is removed, the oobleck will lose its shape.
  1. Feel free to mix in glitter or to substitute glowing water for regular water to make oobleck.