Die-cut pages reveal the scary and mean parts of a bullybug, but just as it is about to attack some "itty-bitty baby bugs," the bullybug is chased away until it learns to behave.
"With the turn of every die-cut page, see Little Green Monster's face gradually appear. Then, as the stars come out, get ready to say good night!"--P. [4] of cover.
Monsters of different colors explain what makes them feel glad, sad, loving, worried, silly, and angry. Fold-out masks encourage readers to talk about their feelings.