54 pictures of President Obama discovering his inner child on his 54th birthday

Happy Birthday, President Obama!

The 44th President turns 54 Tuesday, his second-to-last birthday in office. He's a Leo and, incidentally, Leos are ambitious, magnetic and love being center stage - which sound like qualifications for the nation's top job.

Obama celebrated his birthday over the weekend in similar fashion to last year - a golf outing on Saturday afternoon with friends from Hawaii at Andrew Air Force Base and a family night at Camp David.

On Tuesday, his actual birthday, Obama is back on the presidential grind. In the morning he welcomes United Nations Secretary-General Ban Ki-moon to the Oval Office, according to the White House. That will be followed by his weekly lunch with Vice President Joe Biden. On the list of conversation topics: Biden's potential run for president?

In the afternoon, Obama will host a first-time event: White House Demo Day, in which entrepreneurs from across the country will pitch innovative ideas at the White House. He'll wrap up his busy birthday by meeting with American Jewish community leaders on the Iranian nuclear deal.

Perhaps sometime between these events, Obama will have time for some birthday cake.

In the meantime, celebrate 44's 54th with pictures of him doing one of the things he does best: kissing babies and embracing his inner child.

Editor's note: This is an updated version of an earlier post. Brett LoGiurato and Amelia Acosta contributed to an earlier version of this post.