Usage Tips:With portable marble jar for easy storage, take it anywhere and have fun anytimeThere are swirls in the coloring for each color. Great for Chinese Checkers, marble runs or any other marble game.Have endless fun with our marbles everywhereWe believe you or your little would definitely love our marblesAge: 3 years old and above.Decorative your favorite aquarium; aquarium decorationDIY the pattern that you like in your spare timeAlso can to put these marbles in your garden the way to make a beautiful landscape and a good moodsize:16mmMaterial:glasscolour:Black+white Package Contents:10 * Black glass marbles10 * white glass marblesOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.