This wooden puzzle box from Professor Puzzle is the perfect challenge for any puzzle enthusiast. With an irregular shape and the size of 9x9x9, this puzzle will keep you entertained for hours. The bundle includes The Einstein STEM puzzle, which is inspired by the great scientist himself. The puzzle is designed to challenge your problem-solving skills and improve your spatial awareness. The puzzle box is made of high-quality wood and features an art theme that will look great on any shelf. This brain teaser falls into the categories of Brain Teasers & Cube/Twist, Contemporary Puzzles, Puzzles, and Toys & Hobbies. Get ready to put your mind to the test with this challenging puzzle bundle!