Caldecott Medal winner Paul O. Zelinsky’s first moving-parts book since the best-selling Wheels on the Bus is a beauty. To the verses of “This Old Man,” an ingenious visual narrative follows a young boy as he ventures outside. Along the way, children can push tabs, turn wheels, or lift flaps to see ten different old men pop out of hiding to play Knick-Knack. Children (and critics) agree that Knick-Knack Paddywhack! takes the interactive book to a new level of imagination.