I was shown this wonderful phone case by Will. It's a Penrose Tiling. I confess to having never heard of them but here's the explanation
https://en.wikipedia.org/wiki/Penrose_tiling I think they will take some investigation and might make a good patchwork project. The case is an example of P2 tiling. My new ambition is to see the floor in the Maths Institute at Oxford.
