Features: Learn from fun: The brain teaser puzzle offers you a game that combines learning with entertainment. The process of completing the puzzle not only brings you fun and releases stress, but also cultivates your logical thinking. Wide usage: These fun puzzles are suitable for party, Christmas stockings stuffers, holiday activities and so on, to bring you more fun to your daily life. It is a nice way for friends or family to spend time with one another, while actually doing something that is good for your brain, also can be regarded as a nice conversation starter. Specifications: Material: zinc alloy material Size and color: as shown in the picture