The American sculptor is credited with inventing what is now a fixture of nurseries, children’s bedrooms and institutional lobbies everywhere: the mobile, as the artist’s hanging sculptures were first dubbed by Marcel Duchamp. This retrospective exhibition at the Montréal Museum of Fine Arts pays tribute to Calder’s visionary and influential body of work, ranging from large-scale sculpture to wire “drawings” to painting to toys, supplemented by ample archival materials.