This DIY expanding foam pen set comes in a window box and includes 240 pieces per box, making it a substantial option for retailers. The pens are designed for arts and crafts activities, specifically for drawing and coloring projects that create a unique, expanding foam effect. This product is intended for children aged 3 to 6 years old, offering a creative and engaging way for young kids to explore art. The carton measures 46 by 32.5 by 25 centimeters. This item is sold wholesale by the box.