Manually use your brain to make the user brain sharper and hands more dexterous. In the case of children, they can develop their intelligence, exercise their brain motivation and power, grow up happily with play, and give children a happy childhood. the intellectual brace contains many math rules: playing frequently can distract from thinking, increase brain activity, improve IQ to some extent, play with classmates, promote friendship, and do more. it can provide a way to relax while working, it can relieve stress, relax the body and mind, and work and rest. Older people often play with their manual brains to keep clear and active thinking, effectively prevent dementia and even prolong life. Why not put down the mobile phone, turn off the TV and feel the charm of the intellectual clamp together Contents : Metal Perplexing Puzzle Brain Toy -1.