Is it a solid or a liquid?

A great culmination of our "states of matter" science unit was this fun experiment: We mixed up cornstarch and water and then asked, "Is it a solid or a liquid?" Sometimes called "oobleck," this concoction is interesting because at times it acts as a solid (like when you apply extreme force to it), but at other times it behaves as a liquid (oozing all over our hands). Whatever you call it, it's really fun to play with!

(For the record, the students correctly concluded that our mixture was in fact a liquid. Liquids always take the shape of whatever container they're in, and our oobleck definitely did that!)