one of my favorite (lost!) pastimes from my childhood:
a toy where you had a disc like a stencil to draw with pencils and markers
yielding limetless combinations of patterns
unfortunately I have never been able to re-find this gem, let alone find out what it was called even – sigh it simply didn’t survive all the moves and the spring cleans
I took it upon myselv to try and recreate this,
matematically and via recall – and I did it!!