World's only panda triplets celebrate 4th birthday

The world's only giant panda triplets celebrated their fourth birthday in southern China Sunday.

According to state media, Chimelong Safari Park invited triplets from 100 families across China to the pandas' birthday party.

The pandas ate a special birthday cake made of bamboo, and then clung to ice blocks to cool down.

The three pandas were born on July 29, 2014 in Guangzhou.