Mini Puzzle Set: We have a total of 24 mini mazes with different difficulty levels, each with dimensions of 40 x 40 x 40 mm. Our marble maze box is packed in a color box. Children will like this gift very much. Safe materials: using safe and environmentally friendly plastic materials, no peculiar smell, very safe, you can play with your children, promote logical thinking, memory and skills, and grow up healthy and happy with your children. Multiple Functions: Thanks to their compact size, the portable puzzles can be used anywhere, whether at home for a game night, on the road in the car, at school or in the office. Consider how to balance the steel ball with the ultimate goal of developing thinking skills, reducing stress, improving concentration and patience, and improving family happiness. <p >IDEAL GIFT: This puzzle can not only improve children's attention and hand-eye coordination, but also improve their hands-on skills. Our puzzle games are the perfect surprise for children's birthday parties, fun parties, school presentations, advent calendars or as a gift for girls and boys.