BUILD YOUR BRAIN Intellectual challenge for problem solvers and game lovers, this wooden Tetris piece puzzle delivers hours and hours of fun and mystery; take apart and put back together Intelligence puzzle toy originated from ancient China which called Kong Ming Lock. Wooden game with interesting logical thinking and perfect for development of brain. Nice challenge to both adults and kids.

RELAXING CHALLENGE This educational toy provides a tough challenge but also allows you to relieve stress, relax your mood, and enjoy brain stimulation; fun for families, students, children

DEVELOP SKILLS Clever 3D puzzle design builds genius skills, including the ability to problem solve, spatial imagination, creative thinking, and more; play again and again to exercise your brain Compact Size: product dimension: 3.1 × 3.1 × 3.1 inch (8 × 8 × 8 cm). Weight: 0.1 pound (0.05 kg). A handsome addition to a desk or table, worthy of displaying! This one is so attractive that it can easily be used as a decoration in a den, family room, living room, working table, office or waiting room. 100% Brand new and high quality. Totally 54 pc blocks in Tetris shape The top goal is disassembling and assembling the lock, The lock looks simple, but it contains lots of mysteries Good way to improve your divergent thinking and patience. For children 3+ years.