WATCH: Panda Bao Li celebrates his 4th birthday at DC’s National Zoo

What’s black and white and full of birthday cake? The National Zoo’s Bao Li, who celebrated his fourth birthday Monday in D.C. with dozens of adoring fans watching.

The crowd gave muffled gasps, chuckles and “awws” as Bao Li dug into his multi-colored frozen fruit cake.

“But he definitely passes cake because he went right to it. So we give him a passing grade on that,” joked Cyndy Taylor, a local first-grade teacher and panda enthusiast.

“The zoo did a great job, like they always do, the ice cake, the fruit, the signs they made for him,” said Karen Wille, a long-time panda fan and conservation advocate.

One of those signs read, “Roar I’m Four” and had Bao Li dressed in a tiger costume.

The young male is one of four

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