Educational ToysThe simple design looks insignificant but actually quite complex to figure out. Which can enhance kids' Patience and thinking ability, good for thinking and developing intelligence, improve problem solving abilities while improve both your IQ& EQ. Offer you freshness and fun at any leisure time. Classic Toy for Kids and AdultThis is a Chinese classical educational toy which contain many mathematical and physical principles. While providing us with entertainment, release the working pressure of the adults. Exercising elderly People brain, help prevent a decline in memory of the elderly. How to PlayThese metal brain teasers provide for a great challenge it comes with wire pieces twisted together, to unlock the ring puzzle you need to maneuver the pieces until you will be able to separate them. Lots of fun to play with family and friends and compete who can disentangle the puzzle first. Applications for SupplyingMultifunctional brain teaser puzzle set for all occasions, these are perfect to hand out for birthday parties, party favors, classroom rewards, educational prizes, gifts, stocking stuffer, Easter egg filler, and much more. Durable MaterialThe puzzle toy is made of Zinc Alloy, high toughness and no deformation, non-toxic. The material is not easy to rust, not easy to fade, sturdy and durable. The excellent processing makes the toy has smooth surface and not easy to hurt the hands. Specification: Material: Zinc Alloy Color: As Pictures Shown Package Size: Approx. 6.2 * 6.2 * 0.7cm/2.4 * 2.4 * 0.3in Package List: 1 * Intelligence Buckle