Cayro Metal Box Pentominoes are a logic puzzle from the Spanish brand Cayro, founded in 1954. They consist of 12 distinct geometric pieces, each formed by five squares joined at the sides, which combine in multiple ways to complete different challenges and boards as outlined in the included instruction booklet. It's a single-player game, ideal for developing logical reasoning, spatial visualization, and concentration. It comes in a compact metal box, easy to transport for travel or school. Suitable for children aged 5 and up, and for adults who enjoy logic puzzles. It combines well with other Cayro logic games.