In this experiment, students work with oobleck (or a mystery substance) and have to determine if its a solid, liquid or gas based on experiments they design. All you have to do is supply the oobleck ingredients (2 parts cornstarch to 1 part water). G
If you've never mixed together cornstarch and water, do it now! This "goo" can act as both a liquid and a solid depending on how you handle it. Kids of all ages will play with it for hours (including myself!). Add some food colouring and watch the colours mix together!