The children conducted an experiment called the The Walking Rainbow.

Here are the instructions:

• Fill three glasses with water and food colouring (blue, yellow, red).
• Put an empty glass between each glass.
• Cut a paper towel in half and fold it lengthwise two times.  Place one end in the water and one end in the empty cup.
• Watch the colours mix.

We discovered that:

• blue + yellow = green
• red + blue = purple
• yellow + red = orange

Try this experiment at home