codex silenda puzzle book, 3d wooden puzzle difficulty level 10 brain-burning puzzle, decompressing puzzles for kids adults brain teasers toy educational games gift sbkdpt these are impossibly challenging clear puzzles that will bring hours or days of entertainment. this is a great item for any puzzle lover. the pieces are durable and will last forever and won’t be damaged by heat or moisture.<br/><br/>features:<br/>1. the codex silenda puzzle book is challenging puzzle games for developping the thinking, imagination and patience.<br/>2. durable, no smell. it has a very long-lasting using life.<br/>3. the outer packaging is a beautiful box, very suitable as a gift for your families and friends.<br/>4. the story follows the apprentice in da vinci's workshop who encounters the same codex. however in the story the codex acts as a trap set by da vinci to capture any would be spies/snoopy apprentices in order to protect his work. the only way to escape is to solve each of the puzzles before the master returns from his trip.<br/><br/>specification:<br/>material: wooden<br/>size: 9.8x9.8 in<br/><br/>package content:<br/>1 x codex silenda puzzle book