What is a scientist? Second grade students had a ton of fun exploring a slimy substance called "oobleck".  Students were challenged when asked if this was a solid or liquid- we discovered that sometimes oobleck acts like a solid, and sometime a liquid. The scientific term for this is called a "dilatant".  If you would like to make oobleck at home, all you need is cornstarch and water. Basically the ratio is 2 parts cornstarch to 1 part water. Have fun (and best done outside!!)