8 different shapes; Made of metal.Intelligence game toy.Age 6+;Great challenge for kids and adults;Good for creative thinking and improve both your IQ & EQ.Metal brain teaser condenses with traditional Chinese culture and they are quite interesting.Age 6+The Chinese Rings Puzzle is believed to be one of the oldest puzzles known， dating back to China over 2000 years ago. We believe that what makes it so popular is that it cleverly combines both logic and creative thinking.The most representative of Chinese classical intelligence toysPractice the brain， logical thinking ability and finger musclesIt also can cultivate the spirit of work study focused and your patienceSize:as the picture shownPackage Included: 1 x set of 8 pcs Metal Ring Brain Teaser Puzzle