The If Machine, 2nd Edition

Twenty-five ready-to-use philosophy sessions for children aged five to thirteen, from Peter Worley, founder of The Philosophy Foundation. Each session opens with an imaginary situation followed by a sequence of questions on ideas like values, identity, existence, and beauty, with a star rating for difficulty and a troubleshooting section for common problems like unanimity. This second edition adds new hints, tips, and a companion website.

Written for classrooms, but it works just as well at the dinner table or as part of a homeschooling curriculum. Each session is a short imaginary scenario with a question buried in it, and the follow-up questions do the hard part of keeping the conversation going past a kid's first answer.