The photo above is a sculpture called "Big Red Swing." It's in the outdoor lobby area of 777 Third Avenue. It's a good example of the kind of element he liked to have built into his buildings. Kaufman was not an architect--he was a developer--but he was intimately involved in the planning of his buildings. The swing that you see is meant to be sat on and it moves ever so slightly--a delightful reminder of the flow of nature in a carefully constructed, right-angle-dominated world like midtown Manhattan. Here's another view:
Kaufman delighted in the unexpected in his building lobbies and even on his rooftops. At 77 Water Street, Kaufman placed a replica of a World War I biplane. While not visible from the street, anyone in nearby buildings is treated to this most unexpected building adornment.