Hanayama cast puzzles are the world's finest brain teasers. Can you take the pieces apart, then put them back together again? Hanayama cast metal brain teasers have 6 levels of difficulty, and each puzzle is Mensa-rated. Level 6 puzzles are considered very difficult by most puzzlers. Hanayama cast puzzles are the world's finest brain teasers. Can you take the pieces apart, then put them back together again? Gold and silver, two pieces that make a smooth intertwined shape. I want you to return to a beautiful heart from the disengaged state. Sleek, high-quality cast metal materials ensure each piece endures years of vigorous play. Level 1 puzzles are considered easy by most puzzle enthusiasts. Take on the challenge yourself or gift this intricate brainteaser to the puzzle enthusiast in your life! Suggested Age: 12 Years and Up