Includes 16 different styles of wire puzzles made of high quality materials that prevent shapes from bending and breaking.IQ toys have no sharp edges to ensure the safety of you and your child. If you receive the wrong item, please ask us for a full refund or a new replacement. Ring Puzzle Designed to test your brain and help practice concentration and focus. Open your mind! Try to separate the two pieces of the puzzle and surprise your friends, you may love this game. Metal puzzle brain teaser condenses traditional Chinese culture, which is helpful for creative thinking and improving IQ and EQ. The metal wire puzzle set is suitable for children and adults, especially those who like a challenge, but not for children under 6 years old.