Little Hilbert's Hotel is an interactive picture book designed to introduce children to the concept of infinity through storytelling. Based on David Hilbert's famous "Hotel Infinity" thought experiment, the book presents a mathematical puzzle in an engaging narrative format that children can understand and enjoy. The book's core feature is its interactive storytelling approach that teaches mathematical concepts without using complex terminology. The narrative follows what happens when a new guest arrives at a hotel where every room is already occupied. Through the simple solution of having every guest move up one room, the story demonstrates mathematical principles about infinity and sets. What makes this book unique is that "the story IS the proof" - the narrative itself serves as a mathematical demonstration. The book avoids using words like "infinity" or "set" while still presenting mathematically accurate concepts. This approach allows children to grasp complex mathematical ideas through an entertaining story rather than formal instruction. The book is available to read free online, making it accessible to families and educators worldwide. A hardcover version is currently in production, with a waitlist available on the website for those interested in the physical edition. Created by Itai Bar-Sinai for his son, the book aims to make cool math concepts engaging and fun for children. The interactive picture book format combines storytelling with visual elements to create an educational experience that doesn't feel like traditional learning.