· This little book contains fill-in-the-blank lines to describe why your mom's the best· Just complete each line and voila: you have a uniquely personal gift Mother will read again and again· Make it as hilarious, honest, or heartfelt as you choose!· Great as a Mother's day gift from kids of all ages· Knock Knock is an independent maker of clever gifts, books, and whatever else they can think up; their mission is to bring humor, creativity, and smarts to everyday life