10 Colored Pencils: The package contains 10 building block crayons. Each crayon has 12 colors, corresponding to 12 detachable small crayons. Enough for kids to use and replace every day, or to share with their friends and classmates. Safe Aand Durable: The crayon refill is made of paraffin wax, and the pen case is made of plastic, which is lightweight and easy to hold, bringing you bright and fresh colors. Safe for kids and toddlers, your kids can use these stackable crayons with confidence. Adjustable Size: The total length of crayons is 10 inches, and a single small crayon is 1.5 inches. You can change the position of the color and the length of the pins yourself. Holds securely in a child's hand and won't chip, stick or smudge. Colorful Designs: These colorful crayons are buildable and disassembled, kids can assemble these crayons and pencils into different shapes. There are 12 colors of crayons, rich colors give you more choices, and one pen can solve simple painting problems. Kids Gifts: These rainbow stacking crayons make drawing, painting and artwork fun and enjoyable, suitable as kids birthday boy and girl party gifts, Christmas gifts, Easter gifts for kids, classmates, students or friends. This colored pencil set is perfect for party supplies, Christmas and Halloween. It's the perfect addition to a birthday party. Colored crayons are easy to draw on paper, easy to remove, not only useful as paint crayons but also as stackable toys. The rainbow crayon set is designed with bright colors, which brings a fun and smooth coloring experience to children, and brings you a wonderful use experience. Specification Material: Paraffin and Plastic