Sink Monster

What do you do if your plumbing has air intake problems, making sonorous grumbles and growls, and your students are scared to wash their hands?

Well, you Google for the cutest, pinkest picture of a monster, print it out, and give it a speech bubble: "Hello! Welcome to my sink. Sorry if I burp loud. I don't mean to scare you." Then the kids actually bond with the sink (monster) instead of fear it... and their hands are clean.