Changing Color of Water Experiment

Here's a neat little rainy day science experiment you can do with your kids right in your kitchen with just a few supplies you already likely have.  Grab three small jars or glasses of the same height and fill all three with water.  Place a few drops of food coloring in two of the jars.  Make sure the colors are different in each jar.  Now take a napkin or paper towel and roll it into a long, narrow shape.  Stick one end in a colored jar and the other in the plain water jar.  Repeat for the second jar of colored water.  You should have something like this:

Watch the paper towel very carefully and you'll easily notice it soaking up colored water.  It'll take a bit, but eventually the colored water will soak all the way through the towel and start coloring the clear water.  In our experiment the blue did MUCH better than the red.  The next day we woke up to this:

You can't really see it in the picture, but the blue water soaked up through the red water' jar's paper towel and turned it a very light shade of blue.  My daughters thought this was pretty cool, especially the next morning when the clear water was now blue!