Challenging Brain Teaser Puzzle: The Grecian Computer puzzle challenges you to turn the dials until all 12 columns add up to 42 with a difficulty rating of 5 out of 5 High Quality Gift Option: This high quality brainteaser puzzle makes a thoughtful gift for history buffs, game collectors and puzzle enthusiasts who can play and then display the item Historic Inspiration: All brainteasers from the True Genius line are inspired by one of five different ancient civilizations from around the world including Rome, Greece, China, Egypt and the ancient Aztec empire Engaging Logic Game: True Genius brainteasers engage curious minds across a wide age range and these unique logic games sharpen minds and fingers at the same time with mechanics that take moments to understand but require time to master Quality Manufacturing: True Genius by Project Genius has been a leading manufacturer of mechanical puzzles and strategy games throughout the United States for over 10 years committed to developing unforgettable puzzle-solving experiences with high-quality materials and innovative design Wood Construction: This brain teaser puzzle is crafted from wood materials based on ancient artifacts providing both durability and an authentic historical aesthetic