If you haven’t seen it by now, Google is running a tribute to Alexander Calder on the occasion of his 113th birthday. Mr. Calder personally stopped celebrating birthdays in 1976 but that doesn’t mean you can’t celebrate his. The mobile is interactive and almost as enthralling as Calder’s own mobiles. Does this remind you of the time one of his mobiles appeared on Antiques Roadshow? Let’s watch a second time: Alexander Calder Mobile ca. 1950 – $400,000.00 to $1,000,000.00