Learn colors while laughing with 5 hungry monsters In this laugh-out-loud, colorful pop-up board book, monsters under the bed eat things like red underwear, those in the bathroom enjoy bath soap and yellow duckies, and attic monsters just love old books and umbrellas. Kids will learn their colors while getting a kick out of reading the silly rhymes and opening the monsters' mouths to find a surprise pop-up of what's inside.