Creative Crafthouse Stomachion Brain Teaser Puzzle for Adults, Archimedes | Acrylic tiles in a solid wood frame and tray. Rebuild the 7.5 inch square or form animals and ships, a math history gift

Features

• Often called the world's first puzzle: Fit 14 acrylic pieces into a single square, then take it apart and rebuild it a different way. This is the ancient dissection puzzle studied by Archimedes himself.
• A real math challenge: The 14 pieces form the square in 536 distinct ways, a result mathematician Bill Cutler proved by computer search in 2003, or 17,152 when every rotation and reflection is counted separately.
• Sized for a desk or shelf: The finished square is 6 inches across in a 7 by 7 inch frame, and the wood cover closes it to 7.5 by 7.5 inches, as shown in the main photo. Rated hard, a long challenge for patient solvers.
• Far more than one square: Rebuild it many ways or form 19 other shapes, from animals to ships to geometric figures. Ships pre-assembled in its wood tray with a wood cover and a printed solution sheet.
• Handmade in Hudson, Florida by Creative Crafthouse: Laser-cut acrylic pieces sit in a floorboard frame that resists scratches and water. A made-in-USA gift for math lovers, history buffs, teachers, and collectors.