Resources
Red and blue food colouring two glasses of water a leafy stalk of celery Step by step
* Talk with the children about how plants, as well as animals, must have water to stay alive.
* Add several drops of red food colouring to one glass of water and add several drops of blue food colouring to the other. Stir well.
* Cut the celery stalk part way up the middle.
* Put one 'leg' of the celery in the blue water and the other 'leg' in the red water.
* Leave in the glass overnight.
* See how the food colouring travelled up the stalk as the celery 'drank' the water. Ask the children what has happened to the leaves.
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