Miss Kathleen informs us that March 3 is World Read-Aloud Day, so here are some suggestions if you're at a loss:
For babies, my all time favorite: Moo Baa La La La  If you read this one everyday, then you can recite it without the book (just like me).
For toddlers and preschoolers: Home For a Bunny  --perfect for springtime and the upcoming bunny season. Also the Golden Egg Book . Another great one - Pete's a Pizza . This one is especially good for any dads who try to shirk their read-aloud duties.
For older elementary: Jojofu , (includes giant snake) Brave Margaret (includes people-eating ogre), and since St. Patrick's Day is coming: The Last Snake in Ireland (This is a humorous tale of how Patrick removed the snakes from the land of Éire.)
For elementary, junior high, and high school, how about a story from a collection like: The Emerald Lizard: 15 latin American Tales to tell in English and Spanish  (my favorite from this collection is "Five Eggs")or While Standing on One Foot: puzzle stories and wisdom tales from the Jewish tradition . (my favorite from this one is "The Court Jester's Last Wish")