Try the Grecian Computer Brainteaser Puzzle. Test your true genius skills with the Grecian Computer - a wooden brainteaser puzzle based on ancient artifacts. Perfect for advanced puzzlers and anyone who is up for a challenge! Try to turn the dials until all 12 columns add up to 42. Difficulty rating of 5/5 stars. For 1 player. Recommended for ages 14 and up. Wipe clean with dry or damp cloth. Assembled Dimensions: 7"L x 6.5"W x 2.5"H. Origin: China. Warning: Choking Hazard - This toy contains small parts NOT for children under 3 years.