http://pbskids.org/zoom/activities/sci/plasticmilk.html
Basically you mix 4 teaspoons of white vinegar with 1 1/4 cups skim milk. Then you microwave it for 2 minutes and then strain out the chunks.
Yeah - its gross but the kids love it!
I had the kids smell the vinegar, mix the two ingrediants and help set the microwave. Then they had to write how stinky it was along with the directions.
Then I had their daddy do the dirty work of straining it:
The fumes must have gotten to him :)
Everyone was leery to touch it at first!!
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