Cornstarch mixed with water creates a unique substance often referred to as a non-Newtonian fluid. When pressure is applied, it behaves like a solid, but when left undisturbed, it flows like a liquid. This interesting property makes it a popular choice for science experiments and demonstrations. The mixture is simple to make: combine equal parts of cornstarch and water, stirring until smooth. This combination is often used in educational settings to illustrate concepts of viscosity and states of matter. It can also be used in arts and crafts, providing a fun, tactile experience.