Feature:Luban lockTest logic and creative minds with this cool yet simple brain teaser. These brain games are perfect for paing time, fidgeting, and avoiding gadgets and electronics. They're a healthier way to practice focus and concentration. Can also be used for fun party games.Durable and safe for children: made of thick and durable zinc alloy material, which can keep the shape of the puzzle intact, can be used for many years, non-toxic material, absolutely no sharp / cut edges, and accompanied by neceary instructions.Widely applicable: puzzle brain games are suitable for people over 6 years old, which can bring more fun to your party; Try to add these metal puzzles to your Christmas stockings, or apply them to holiday activities, enjoying hours of game playing.Feautrue:Children with strong hands-on ability are smarter than same age kids.Give your child more hands-on skills! Exercise from an early ageSpecification:Material: metalApplicable:Over 6 years oldPackage Included:1 set Intellectual Toys (8/25/30/40pcs)Notes:1.Due to the lighting effects and shooting angles, the color of the item and that shown in the picture might have a nuance.2.Due to manual measurement, there might be a tolerance in the product size Thank you for your attention, There are so many useful and cheap item in our store. we will be ready to reply you ASAP.