Folks will do almost anything if they're happy (and they know it)--from flapping their wings to touching their toes. At least they will in David A. Carter's pop-up version of the popular play song. Preschoolers will join in with glee, singing, "If you're happy and you know it...," while they help the playful animal characters clap their hands, wag their tails, and wink their eyes. Children pull simple tabs to animate the brightly hued cut-paper cat, dog, skunk, chicken, owl, and mouse. On the last page, all six animals pop up to "shout hooray" in a dramatic display of Carter's paper engineering flair. Musical notation for the song appears on the back cover. Carter has created many well-loved interactive picture books, including another pop-up nursery song, Old MacDonald Had a Farm, as well as Alpha Bugs: A Pop-Up Alphabet and Easter Bugs: A Springtime Pop-Up. (Ages 2 to 5) --Emilie Coulter