Educational & entertaining - Our 30 different metal puzzles are brilliant to encourage kids & adults exercise logical thinking & hands-on ability, improving spatial imagination & creativity. Guaranteed to be highly educational, developing intelligence & brain power, whilst also entertaining at the same time. Face the challenge - Each metal puzzle is completely unique, in 30 different designs, ensuring great challenges all round, each time. Despite its apparent difficulties in solving the puzzles, rest assured that the satisfaction of a job well done, makes it all worth while. Relax & destress! Premium quality - Made from premium quality high carbon steel & electroplated nickel silver, the puzzles are solid & durable, making for many hours of concentration & fun! Dimensions per piece 6 x 3 cm. Safety warning - Our metal puzzles contain small parts & may present risk of suffocation caused by ingestion by children under 4 years of HS6 Tariff Code : 9503006000 Dimension: 15 x 4 x 22 cm