Have You Filled a Bucket Today? by Carol McCloud and illustrated by David Messing is a unique book that teaches children about the abstract concepts of happiness, love, and self esteem. In my opinion this book would be enjoyed most by young school aged children. The concepts might not be fully understandable for children under 4 or 5, but the book is colorful and engaging enough that younger listeners would like it. I know my two year old enjoys having it read to her.
The basic idea of the book is that happiness and self esteem grow as we give and receive love and kindness. They become depleted when we bully, and treat others in unkind ways. The book gives some good suggestions for showing love and kindness too.
This is a very upbeat and positive book to add to your child's collection!