Test logic and creative minds with this cool yet simple brain teaser. These brain games are perfect for passing time, fidgeting, and avoiding gadgets and electronics. They’re a healthier way to practice focus and concentration. Can also be used for fun party games. | 3D brain teaser : Precision assemble non-identical pieces into a 3D shape. Challenging 3D puzzle game. Your mind will be sharpened enough to develop their problem solving capacity through reasoning, development of mental stamina and boosting their self-confidence. | Wooden 3D brain teaser puzzle toy originated from ancient China which called Kong Ming Lock. Wooden game with interesting logical thinking and perfect for development of brain. | Metal coils are smooth and has NO SHARP EDGES for endless play without getting hurt. The links are made from heavy duty 4.5 stainless steel that doesn’t easily bend or break even when thrown or stepped on. Players can’t force them open so there is no chance of cheating. | Perfect gift - For every occasion! for Christmas gifts, office gifts, etc. 3D brain teaser can take anywhere.