Several years ago my parents gave the girls  Who Do You Love? by Margaret Wang and they still love it.  I have read the book to them many times and now they can read it on their own.  The book is encouraging for the kids because it goes through the variety of people in their lives that love them.  This is a terrific book especially for younger kids as they are learning about the family members, (including siblings, parents, and grandparents).  When the girls were little after reading the book we would talk about their grandparents and share memories.  It is now great seeing them read it together and share memories with each other.