In 1901, divers discovered a strange contraption in a 2,000-year-old shipwreck. Experts believe it was used to track the cycles of the solar system. Based on the "Antikythera mechanism," considered the world's first analog computer, this brainteaser challenges you to turn the dials until all 12 columns add up to 42. Finished to look like an artifact from long ago, wood puzzle is 6" diameter. Ages 14 and up.