Hanayama cast puzzles are the world's finest brain teasers. These high-quality, cast metal puzzles come in six challenging, Mensa-rated levels of difficulty. Inventors from around the globe compete to have their designs included in the line. These 5 versions are among the most popular, hardest to complete and all level 6. Hanayama puzzles are recommended for ages 12 and up.Solutions are included case you find yourself stumpedAll puzzles are well made and will add uniqueness to your home decorMakes a great gift or party game.