Description: Made of environmentally friendly alloy materials, which can keep the shape of the puzzle intact. Very classic and quite interesting. Good for creative thinking and improve your IQ. After getting each puzzles solved by yourself, then you will get achievement, allows you to relieve stress, relax your mood, and enjoy brain stimulation. It is specially designed to test your brain, helps to improve brain, eye, and hand coordination, visual-spatial faculties. Great gift for families, students, adults, kids, perfect fits for party favors goody bags, Christmas stockings. Perfect for passing time and avoiding gadgets and electronics. They’re to practice focus and concentration. Specification: Material: Alloy Recommended age: >5 years old Color: Please refer to the picture Package Includes: 1x IQ Test Toys(2 Pack) Note: Transition: 1cm=10mm=0.39inch Please allow slightly 0-1cm difference due to manual measurement. Colors can appear different depending on light and how the listing is viewed. Thanks for your understanding and attention. Wish you a pleasant shopping experience!