Over a million young readers have enjoyed the wheels that go round, doors that open and shut, and people who go bumpety-bump. Today it remains as fresh and engaging as when it was first published twenty five years ago. To celebrate the anniversary, Paul O. Zelinsky has created an all-new cover featuring twenty five, hidden 25s. Some are the number 25 and others are 25 of something in the picture. Can you find them all?