Materials
Milk
Liquid Dish Soap
Red Food Coloring
Blue Food Coloring
Shallow Dish
Directions
Pour cold milk into a shallow dish. Add 1 drop of red food coloring to one side of the bowl and 2 drops of blue food coloring to the other side. Then, add a drop or two of liquid dish soap to the center of the bowl and watch what happens. (You should see the colors begin to swirl and move.)
Pour cold milk into a shallow dish. Add 1 drop of red food coloring to one side of the bowl and 2 drops of blue food coloring to the other side. Then, add a drop or two of liquid dish soap to the center of the bowl and watch what happens. (You should see the colors begin to swirl and move.)
If the colors stop moving, you can add another drop of soap. Eventually, the colors will mix together to form purple. It does take a bit of time to occur, so you may want to give the mixture some help by stirring it until you get a good purple color.