Core77

Karl Knauer is a Germany-based company that makes paper, cardboard and cartonboard packaging and advertising media. They've come up with a proprietary way to glue paper sheets together to make their Design Paper Cube, a sort of flexible Post-It stack, available with customized printing on both the face and sides, that doubles as a desktop plaything:

As I have the attention span of a terrier, I'd definitely have to keep these off of my desk in order to remain productive.