Today, we made Oobleck using cornflour and water. It was really messy but so much fun! Oobleck is a non-Newtonian fluid which is a another meaning for fluids that change viscosity (how easy they flow). When we ran our fingers slowly through the mixture it acted like a liquid, but when we applied any force, such as squeezing or pushing down on it, it acted like a solid. We loved investigating with the mixture.