If you couldn’t tell, we have a thing for desktop toys, little doohickeys to help pass the time between meetings and assignments. The latest we want to add to the collection is the Venn Puzzle from Craighill, a Brooklyn-based product design studio. The Venn Puzzle is composed of three identical pieces of die-cast stainless steel. When assembled, the three pieces fit together nicely to form a sphere that’s roughly the size of a billiard ball. After you spin it and the pieces come apart, however, you’ll find that putting them back together is easier said than done. Use it to kill some time between assignments.