What Did Barack Obama Get Prince George for His First Birthday? (Hint: It's a One-of-a-Kind Gift)

Generous present is on display in the Royal Childhood exhibit

What do you get the guy who has everything?

Just like Prince George, Barack Obama has often been that guy, so he knows a thing or two about picking the perfect present. To fête the future King of England's first birthday July 22, the U.S. President sent Prince William and Kate Middleton a custom-made rocking horse for their adorable baby boy.

The gift came with a saddle bearing the presidential seal and a toy polo mallet. The wooden toy was partly made from a branch of an oak tree which once stood on the South Lawn of the White House.

The gift was revealed as part of Buckingham Palace's new summer exhibition, "Royal Childhood."

The exhibit features more than 150 objects—including never-seen-before photos and videos, in addition to luxury toys and other artifacts—giving the public a closer look at the extraordinary childhoods of 25 members of the British royal family. More than 250 years of history will be on display through Sept. 28.

Queen Elizabeth II's baby book is also on display, which reveals what her two first words were, when she lost her first tooth and how tall she was at various stages in her life—among other fun bits of trivia.