Andrew Crowell has this to say about this puzzle:"The Gold Skeleton Key is one of my favorite 3D printed puzzles to date. It accomplished something very few of my previous puzzle designs has. I often leave puzzles out when non-puzzling friends come over, and the puzzles generally go untouched. They claim they are 'too difficult' or they just have no interest. I have been trying unsuccessfully for years to design a puzzle that these people would just want to try and not be 'scared' of messing up...

Kevin Sadler has this to say about Gem: “This gorgeous gem of a puzzle by Osanori Yamamoto is simply stunning made here from Purpleheart... I could see why this was one of Osanori-san’s favourite puzzles. It is delightful. Another piece of Japanese puzzling heaven.”

Pack the three pieces into the box, filling all the openings.