This fun walking rainbow science experiment is super simple to achieve and great fun for all ages to enjoy!
All you need to join in with this activity is a sheet of kitchen roll paper, coloured pens and 2 cups of water. Begin by folding the piece of kitchen roll over 3 times to make it nice and absorbent. Then chose some coloured pens to make a rainbow design. The children could research the correct order of the colours in a rainbow or make up their own pattern. I would recommend using water based felt tip pens because they will blend and carry the water more effectively. Draw a small rectangle using each coloured pen at the edge of both sides of the kitchen roll, do this thickly to help make a bright colour transfer.
To expand on the childrens maths skills ask them to name the different colours on the kitchen roll and challenge the children to predict any new colours that could be made and estimate how far they think the rainbow will travel up the paper on each side. Fill 2 cups to around half full with water as you need enough water to make the colours travel but not to much so that the colour bleeds off into the water. Place the ends of the kitchen roll into separate cups and watch closely to observe the changes.
It is so exciting to watch the colours slowly travel up the kitchen roll creating a fun walking rainbow. You can discuss with the children what colours they can see, if any new colours are formed, explore the change in the colour of the water and even time how long it takes for the rainbow to connect. Providing plenty of learning opportunities suited to different age groups.
I hope you will enjoy having a go at this walking rainbow science experiment!
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