Our goods are authentic, with genuine patents, counterfeit must be investigated! Customers please identify our products! Children with strong hands-on ability are smarter than same age kids. Feautrue: Test logic and creative minds with this cool yet simple brain teaser. These brain games are perfect forpassing time, fidgeting, and avoiding gadgets and electronics. Theyre 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 necessary instructions. Specifications: