The Package Includes 20 pieces stacking crayons, each crayon has 12 colors, corresponding to 12 small crayons, you can make free stacking combinations of small crayons to diy the crayons you want, sufficient quantity for daily use and replacement by children. you can change position of color and crayons length by yourself, they are very popular with kids, can bring more fun to the party games for kids.Our stacking crayons are made of high quality paraffin and plastic, durable and lightweight, easy to hold, safe for to use.Improve Our colorful block crayons are buildable and detachable, allowing to assemble these crayons and pencils into various shapes, which can develop children's ability to identify colors, hand-eye coordination, develop hands-on skills, imagination, creativity, and make drawing and art work fun and enjoyable.weight: 0.84 pounds.