Here is how it's done.
Begin with the following key items for this experiment.
Add 10 drops of food colouring to each of the cups.
Add 1/4 of a cup to each cup. Mix.
Place one stalk of celery into each of the cups.
You'll notice that the colouring begins to draw up the celery almost immediately.
I placed each cup in a container to hold them still and fastened each cup together using sticky tape.
Waiting, waiting, waiting.
Possum gets to enjoy some left over celery.
TA-DA!!!
The celery leaves have changed colour because of the water. This is after 12 hours.
Yellow
Green
Red
and Blue!
Enjoy
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