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 humour, creativity, and smarts to everyday life.