STEM Colour mixing and wicking experiment

Children are very interested in colour mixing so I think this experiment will capture their attention and open up lots of opportunity for discussion.

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When I first saw this done it was using a more absorbant fabric ( and old but clean nappy). I’ve used a chux dishcloth which takes a little longer but that is OK. It means you need to keep checking the progress during the day and over a couple of days.

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The first signs are the cloth strips gradually changing colour and then Oh! great excitement, the colours have transferred into the middle empty jar!

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Without any inteferance (watch those little hands) the colours mix themselves.

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Over the next couple of days the colour keeps travelling. Now we can do some painting.

I know some people use this wicking method to keep their plants hydrated while they are away.

I love finding different ways that people use this kind of practical science. Do you have any ideas?

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