Crazy grandparental antics didn't start in the 20th century. President Benjamin Harrison, for example, gave his grandkids a bunch of goats, including one named His Whiskers, pictured here on the South Lawn of the White House pulling Goat Cart One.
That's Mary on the left, and Benjamin "Baby" McKee and Marthena Harrison in the cart, making me wonder if the Harrisons were somehow ahead of the curve on McKreative spelling, too.
President Harrison's Grandchildren and His Whiskers, c.1889-93, credit:LOC [whitehousehistory.org via dt supersleuth sara]