Forget the shopping and enjoy the best seasonal gift that you or your friends could imagine: LACMA’s pitch-perfect Alexander Calder retrospective. Curated by Stephanie Barron and installed by Frank Gehry in the Resnick Gallery, it’s an ideal fusion of art and architecture, form and space, stillness and motion. Calder and Abstraction, from Avant-Garde to Iconic comprises 50 sculptures and maquettes that trace the artist’s career from 1931 to 1975, the year before his death. Most are grouped in shallow curved bays to encourage visitors to focus on one at a time and surrender to their leisurely rhythms. Gazing at the mobiles as a current of air animates one part and then another, you realize that Calder took the surreal abstractions of Joan Miró, whom he met in Paris in 1928, and added the third dimension of depth and the fourth of time. The compositions are constantly shifting so that each mobile incorporates a multitude.