How to make goop or slime, real name oobleck. This magic mud is easy to make from household ingredients. Its a liquid, but you can roll it into a ball like plasticine. Made with cornflour or cornstarch, water and food coloring, it acts like quicksand, its a non-Newtonian fluid. It's great fun and children love it. Don't tip it down the drain as it could block it.
