Mobiles

A mobile is a type of kinetic sculpture. It is designed to move. The stucture's equillibrium, made up of objects that hang from any number of rods, balances in such a way as to allow the objects to rotate about a string. The sculptor Alexander Calder is well known for his mobiles. Calder is credited with inventing the mobile in 1931, although it was named by Marcel Duchamp. Mobiles are also popular in the nursery, where they hang over cribs to give infants something to entertain them and give them external visual stimulus.