“I paint with shapes,” said the American artist Alexander Calder, referring to his brightly colored moving sculptures that Marcel Duchamp dubbed “mobiles.” In 1941, a decade after he had invented the mobile, Calder had one of the most creative years of his career, experimenting with string, wire, and found objects to create his delightful works of weights and balances. “Calder 1941,” which ends its run today at Pace Gallery, exhibits 15 sculptures, some of which haven’t been shown since Pierre Matisse (son of Henri) presented them at his Manhattan gallery in 1941. For even more Calder, head to the Whitney Museum to see his masterwork “Calder’s Circus,” now on display as part of the museum’s exhibition “Singular Visions.” Created in Paris from 1926 to 1931, the miniature circus features movable acrobats, tightrope-walkers, and sword-swallowers made with simple materials such as cardboard, yarn, and bottle caps.

Tuesdays-Fridays, 11 a.m. Starts: Dec. 20. Continues through Dec. 23, 2011