Leonard A. Lauder was at the Museum of Fine Arts on Tuesday for the opening of an exhibition featuring his postcard collection, which he started when he was 7. Lauder — who’s the widower of Evelyn Lauder — was also in town to see the Zakim Bridge, which is glowing pink through Wednesday night to support Evelyn’s Breast Cancer Research Foundation. “Postcard Age: Selections From the Leonard A. Lauder Collection” is on display through April 14.