On the morning of July 29, 2016, giant panda Xiao Liwu’s exhibit at the San Diego Zoo was filled with decorated gift boxes and treats, in celebration of his fourth birthday. Volunteers painted and embellished the gift boxes, and keepers filled them with various enrichment items—including wood wool, alfalfa and burlap sacks covered in cinnamon—and some boxes were just filled with more boxes. Keepers also created a ice cake, flavored with strawberry-kiwi and fruit punch drink mix, and pureed yams, carrots, apples and honey. His cake was topped with apples and four bamboo sticks that resembled candles.