After an especially "busy" day, a preschool-age boy overhears his mother say, "He's been a monster all day." So the little boy starts to fantasize about what life as a monster would be like. 

Being a monster is fun!" There are no rules to remember or manners to follow. And monsters can stay out as late as they please, scaring everyone away.

As it turns out, being a monster isn't all it's cracked up to be. No one wants to be friends with a monster. And who will read a story and tuck a monster into bed? Maybe being a little boy isn't such a bad thing after all.