Safe sun viewer

On our craft hour with the children we did an amazing sun viewer from a carton box from a piece of paper and a bit of foil ...
The children had to turn their back to the sun and look inside to the box from a small whole that we opened.
Noone thought it's going to be something special but when we looked into the box we could see the clouds and the sun that were behind us and it was really exciting for everyone !!