Abby grinned, "I’d go with the oobleck, it’s a lot of fun to say and play with. For this project, you only need three ingredients. Two parts cornstarch or "cornflour’ as it’s known here in Britain, one part water, and a couple of drops of your favorite food coloring agent. Mix that all up until it’s completely blended and that’s it! Before we start let’s talk about just what oobleck is. Oobleck is a non-Newtonian fluid, a fancy term for a liquid whose viscosity changes depending on pressure. Viscosity is the measure of friction in a liquid and determines how fast or slow a liquid flows. Most liquids have what we call "consistent viscosity,’ for instance honey and water will always flow the same no matter how you pour or press them. Oobleck on the other hand does not have consistent viscosity. If you apply pressure to it, it forms a solid, loosen the pressure and it melt back into a liquid. Because the viscosity changes, it is classified as a non-Newtonian fluid. In chemistry oobleck is what is known as a colloid, a substance in which small particles of one substance are suspended throughout another substance but not chemically bonded."