The San Diego Zoo's panda cub, Xiao Liwu, was given a plastic ball to play with during his 18th exam. The ball is nearly half the size of little Xiao. He loves the ball and doesn't seem to want to give it up. The panda keepers at the San Diego Zoo say they gave the cub the ball to test his coordination and encourage him to play with new objects. Xiao weighed in at weighed 14.5 pounds during his exam. Take a look:
