No, not 10,000 piece puzzles—those would take forever to print. I'm talking about brain teaser puzzles. They won’t match the complexity of the Rubik’s Cube, but they're a fun way to pass the time and a great addition to your coffee table. There’s a set of 5 you can print, ranging in complexity. A Bedlam cube includes a bunch of shapes that, when arranged properly, form a cube. Of course there are some more traditional puzzles you can play with—here's one of Africa, with links to other continents.