BePuzzled Hanayama Ring Puzzle -- Level 4This cast metal brainteaser puzzle, introduced by Nob Yoshigahara, is based on an original design called the Puzzle Ring. Popular in 15th century Europe, it was actually used as an official marriage ring in some circles. See if you can pull the rings apart -- then have your husband, wife, boyfriend or girlfriend reunite them. University Games was founded by Bob Moog and Cris Lehman, who recognized a developing niche in social interaction and learning games for adults and children. University Games creates educational board games designed so that players won"t notice how much they are learning.Product Dimensions: 4.8 (L) x 3 (W) x 1.8 (H)Age: 3 years and up