This is a wooden toy I received as a bonus when I purchased a product from Hida Furniture. You can move the marbles, and I'm not sure how they got inside. The marbles collide with each other, making a clicking sound. The natural design makes it perfect for interior decoration. - Material: Wood - Color: Natural wood (wood color) - Features: 2 marbles This is a used toy that children have played with, so please understand that it is a pre-owned item before purchasing.