Wally is a character from a series of childrens books...

Wally is a character from a series of children's books (of wimmelbuch, i.e. books where there is no text or it is minimal, and a full-page painting is full of small details; often these books have through history - for example, considers the life of the forest throughout the year and provide activities for the children - for example, to find a certain character and tell what he's doing in this picture) "Where's Waldo?", created by British artist Martin Handford.