Magic Milk

Here is another project we did that I had been meaning to do for quite a while!  

You pour milk onto a plate and make sure it fills to the rim.  Then add some drops of food coloring to the milk and make sure that you use a few different colors.  We spaced ours out more than I think we should have, but it still worked.

Drop a small amount of liquid soap onto the center of the mixture.  The liquid soap breaks the surface tension and the milk molecules move apart!

The book that we got instructions from had this to say about the surface tension project...The surface tension of water is strong enough to support small insects such as pond skaters.  The molecules of the milk pull each other together, which stretches the surface of the milk into an invisible skin  This effect is called surface tension.  Adding the liquid soap weakens the surface tension and makes the molecules move around.  This makes the food coloring mix together!

So then the kids got tooth picks and played around with it.  

From here it went downhill ;)

Another fun project!