![ec_cover_secret-birthday-message ec_cover_secret-birthday-message](https://eric-carle.com/wp-content/uploads/2019/08/ec_cover_secret-birthday-message.jpg)
A message in code starts Tim off on an exciting treasure hunt through a dark cave, an underground tunnel, and other strange places until he finds a happy surprise. Die-cut pages demonstrate in a “hands on” way the meanings of place-words like up, below, through, etc.