Skittle Rainbow Experiment

The skittle rainbow experiment looks at sugar dissolving in warm water and osmosis.
Place skittles around the edge of a white plate, alternate the colours making a rainbow pattern with the skittles.
Add a small amount of warm water to cover the bottom of the plate.
The colours starts to move towards the centre.

Ask your child what is happening to the sweets? Why is the colour coming off the sweets?

Talk about the coloured sugar coating is dissolving due to the warm water and we can see the sugar in the water.

The coloured sugar is moving and creating a straight line to the centre due to osmosis.
The colour particles from the skittles move from a high concentration - the sweets, to a low concentration, through a permeable solution.

Thomas enjoyed swirling the plate and making the colours go a brown colour!

Don't forget to save a few skittles to eat as a treat. 😉

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