This charming picture book is a timeless celebration of imagination and make-believe. A brother and sister invite their friends to play good guys and bad guys with them. While playing pretend, this rowdy group of kids dress up as pirates, swimmers, cowboys, and more--imagining a vibrant world where the bad guys cause mischief and the good guys save the day. As the day comes to a close, we see the siblings agree to switch who's "good" and who's "bad" the next day--showing readers that kids can safely try out good and bad personas as they play.