"• PLAY: Endless play for entire family. Easy to put together. Simply connect the balls with sticks and cover the structure with bedsheets to create places where imaginations flourish. Durable, Portable, and best of all no Batteries required (Bedsheets not included). • LEARN: Encourages social interaction and collaborative play between boys and girls. Develops motor and STEM problem solving skills. • CREATE: Crazy Forts come with 69 child safe geometrically precise balls and 44 sticks that join together to form any play space from your child’s imagination. Creates a fun and unique play space every time. • AWARDS: Recognized leader in STEM toys. Voted #1 engineering STEM fort building toy by Purdue University, Smart Toys magazine, and Huffington Post. • VALUE: Includes detailed multi-lingual instructions for creating 5 basic structures. Add more sets to create new structures or use your own imagination. All Crazy Fort building sets are compatible with each other. • Durable • Portable • Easy to build "