The 12mm solid color game balls are versatile and can be used in a variety of games and activities. They are ideal for marble , where children can race the marbles down tracks, learning about gravity and motion. These balls are also great for board games, serving as replacement pieces or for creating variations. Features -Color:Assorted Color -Material:Plastic -Size:1.20X1.20X1.20cm/0.47X0.47X0.47in -Math learning aid: offers a practical tool for teaching math, encouraging children to develop their mathematical thinking and problemsolving skills. -Solid construction: the 12 mm solid balls are safe and dependable, ensuring play for children and peace of mind for parents. -Stimulates imagination: adds an , boosting children's creativity and imagination, ideal for both home and classroom environments. -Skill development: the ball track design promotes the development of operational skills and spatial awareness, improving handeye coordination. - use: designed for durability, committing and extended use, making it a valuable educational resource Package list: 80 x colored marbles