We love this book. Tell Me Something Happy Before I Go to Sleep, by Joyce Dunbar, is a must-read with your little ones. It is so sweet and cozy. The depiction of sibling love and responsibility is a heart-warmer and the illustrations by Debi Gliori are beautiful.
Ramona and I like to snuggle in with this one. And yes, I always come away from it feeling happy before I go to sleep.