Can You Make A Rainbow?

Lots of families have been drawing beautiful rainbows and displaying them in their windows, just like we did in Nursery on our last day.
Why not make a rainbow in a different way? You could collect stones from your garden or on a family walk then colour them using paint or pens in lots of different colours and make your own rainbow in the garden using your decorated stones. You could make an arc of colours or pile them up to make a rainbow stack? That would look so bright and beautiful, it would make everyone feel happy when they saw it.
I wonder how many stones you would need to make a rainbow? Have a count once your rainbow is made and see how many you used. Have a think about if you used the same number of each colour.