Non-Newtonian fluid

The word has since been used to describe a substance that is used as a science aid to teach children about liquids and solids. This oobleck is created from cornstarch or potato flour and water in a ratio between 2:1 and 3:2. Though initially it acts like a viscous liquid, applying pressure quickly will make it appear to be a solid for a short time. The oobleck also behaves unlike conventional solids or liquid when thrown in the air, molded, heated, or vibrated.

Oobleck readily demonstrates the dilatant effect, which means it becomes more viscous when agitated or compressed.