- With clever text and whimsical illustrations, How to Mash Up Monsters will help kids banish their fears - and have fun doing it! Kids will love these clever tricks and tips for getting rid of monsters. The small monsters wish they were little kids so that they could be bigger and stronger. All medium monsters want is some attention. Big monsters are afraid of their own faces so to defeat them, show them a mirror. Some monsters will eat anything, including confetti. Shapeless monsters are the hardest to catch because they can slither through anything. There are many kinds of monsters: the big, the small, the drooling ones, those who sting, those who growl... but all of them are weaker than they look!