Choose your own acrylic colors or engrave a special message in the wooden frame - make our best-selling puzzle your own! These colorful pentomino puzzles are more difficult than they look; they're pretty tricky (basically impossible!) and perfect for someone looking for a coffee table challenge! And if you just can't figure it out- you can check out solutions on our website. We won't tell! Each acrylic puzzle comes with a 5"x5" birch wood frame, packaged in a clear plastic sleeve.