• Hanayama's Coil Puzzle is an intricate brain teaser from our master puzzle inventors
• Separate the 2 interlocking geometric shapes and then put the puzzle back together
• Hanayama is known worldwide for challenging puzzles and quality manufacturing
• Level 3 puzzles are considered moderately difficult by most puzzlers; for age 12 and up
• Hanayama cast metal brain teasers have 6 levels of difficulty, and each puzzle is Mensa-rated