YGZN wooden brain teaser puzzles toy: –3D wooden puzzles, also called Luban Lock or Kongming Lock, are based on the principles of the ancient Chinese construction of buildings and later furniture making. –The components of burr puzzles fit together by means of hidden joints, and they stay together without the use of glue or nails, allowing them to be easily taken apart and reassembled. –The sticks intersect each other, but they are also interlocked so that they stay together without falling to pieces. –Brain teaser puzzles come in different shapes with different internal structures. –The puzzle may look simple, but it contains lots of mysteries, which require much patience and an understanding of spatial relationships to put back together. –This Kong Ming / Lu ban lock cube wooden puzzle toy can exercise fingers, develop patience and intelligence. A great toy fits for all ages. –Parents and kids can both join together in the fun, it is also good to boost the relationship between parents and kidsl Parts Disclaimer: These toys contain small parts, not for children under 3 years in case of swallowing or choking . We do not accept any responsibility or liability for misuse of this or any other products Quality Assurance: -Not satisfied with the product, no question asked, we provide full refund or a free replacement. -We provide 24 hours customer service. Any questions, We will Provide you a satisfactory solution.
