This was a sweet story.  It was about collecting rocks. That may sound boring to some, but this book makes it sound fun.  The things they talk about could happen with many things a child chooses to collect.  I love the lesson in friendship at the end.  It just moves so well and is so cohesive of a story.  I think for some children this will be a perfect book that they will want to keep and share with the kids they eventually have.