Käthi Bhend is a Swiss illustrator and graphic designer known especially for her children's books. She used to live in an old farmhouse a bit outside of the town I grew up. A friend of my parents, I spent some of my best childhood afternoons at her house full of books (so many children's books!).
Here's three pages she did for the annual "Helveticus" book for the youth. It came with a red and a green piece of film. Put on her drawing, they revealed a different image and text each (printed in the opposite color). The red text/green film: "Red is a beautiful color". The red film/green text: "Green is more beautiful".
