Oobleck is a non-Newtonian fluid, which means it can mimic the qualities of a solid or a liquid depending on the pressure applied to it. It is made from a mixture of cornstarch and water, and can feel like a solid when held in a ball, but becomes liquidy when allowed to flow. Oobleck is named after a substance in the Dr. Seuss book "Bartholomew and the Oobleck," which falls from the sky and wreaks havoc in the kingdom. To make oobleck, one can combine one part water to 1.5 parts cornstarch, and add food coloring to make it more appealing to children. Oobleck can be used for various activities, such as making a puddle and quickly dragging fingers through it, putting it into a plastic container and shaking it, or putting it on top of a subwoofer and playing some low frequencies at high volume.