December Birthday Babies

Hank Baskett! Mason Disick! Violet Affleck! See which celeb tots are ending the year with a bang

ROBERT IRWIN

Look who's all grown up! The son of the late Crocodile Hunter Steve Irwin (who turned 9 on Dec. 1) celebrates his father's legacy with big sis Bindi, 14, at the annual Steve Irwin Day held at the Australia Zoo on Oct. 28.