A joyful picture book that celebrates every kid's favorite day of the year, full of adorable art from the illustrator of Goodnight Goodnight Construction Site and I Wish You More.The most important rule is #1: It must be your birthday.After that's been established, a crew of hilarious animals help picture book pros Tom Lichtenheld and Beth Ferry take readers through a joyous romp that covers the most important elements of every year's most essential holiday, including singing; closing your eyes and making a wish; blowing out candles on a cake, then settling into bed and dreaming of your wish coming true.