Little Hilbert's Hotel

¿Qué es Little Hilbert's Hotel?

A free interactive picture book that introduces infinity to kids — based on David Hilbert's famous "Hotel Infinity" thought experiment. The story IS the proof: when a new guest arrives at a hotel where every room is full, every guest moves up one room. The puzzle resolves without ever using the words "infinity" or "set" — but the math is exactly right. Read it free online. Hardcover coming.