Taking apart a Hanayama Cast Puzzle is only half the challenge. Putting it back together again is the rest. Solve the puzzle by turning the dials on both sides (front and back). The solution requires more than just moving forward. Sometimes moving a step back is also important. Hanayama cast metal brain teasers have 6 levels of difficulty, and each puzzle is Mensa-rated. Level 5 puzzles are considered very difficult by most puzzlers. Designed by Vesa Timonen from Finland. # Pieces In Set: 4 Use: Indoor Measurements: 4.75 Length/Inches, 3 Width/Inches Base Material: 100% Metal Care: Wipe Clean Country of Origin: Imported