To wind up our solids and liquids unit we had some fun investigating ooblek. Ooblek is a simple combination of cornstarch and water, with a bit of food coloring. When you apply pressure to the mixture it acts as a solid. You can roll it in a ball, shape it, or even walk on it (if you had enough!). However, when you release the pressure it acts like a liquid and flows right through your hands.
The kids LOVED playing in it and seeing how it would react. A very BIG thank you to Mrs. Koehler for the pictures and for rescuing our ooblek from a recipe disaster caused by Mrs. Heath. :)
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