I discovered this book during Chi Omega's Centennial Philanthropy (Reads Aloud), when we read to elementary school children for the year (1995).
It's a great book -- I loved the main character, Lil Nutbrown Hare, so much I use a variation of it as my screen name!
"Guess How Much I Love You"
by Sam McBratney, Anita Jeram (Illustrator)