Have you seen corn starch learn how much mess it can make!!!

Corn starch mixed with water in a proper propotion can lead to a substance called oobleck
 
Oobleck is a non-newtonian fluid. A non-Newtonian fluid is a fluid whose flow properties differ in any way from those of Newtonian fluids. Most commonly the viscosity (resistance to deformation or other forces) of non-Newtonian fluids is dependent on shear rate or shear rate history. However, there are some non-Newtonian fluids with shear-independent viscosity.

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