Few artists are able to work successfully on both large and small scales, but throughout his career Calder brilliantly moved from the miniature to the monumental and back again. This publication focuses on the enormous stabiles he created mostly for public places, as well as his elegant hanging mobiles in sheet metal, miniature standing mobiles, and chess sets, shedding light on the social and performative aspects of his work. Essays explore how Calder approached the effects of kinetics and space, solidity and transparency, stasis and activity, volume and void. The book also looks at how Calder's small-scale sculptures echoed the public spectacle of his larger pieces, creating a private drama that encouraged direct participation. Whatever the size, Calder's works employed movement and interaction in unpredictable ways, and this enlightening book helps readers appreciate the important continuity of his oeuvre.