My last baby recently started Kindergarten. I have been through this twice before with his older brothers, however being the last one, his starting Kindergarten had a profound effect on me.
I read The Kissing Hand to him the weekend before school started. He has been going to daycare since he was 6 weeks old, so I think that this book was more for me than it was for him. By now, he seems to have no problem leaving me for the day.
The story is about a little raccoon that is going off to school but doesn't want to and how his mother shares a secret with him that will help him through the day each time he is missing her.
When the book was done and my son ran off to go play, I was left sitting there with huge crocodile tears in my eyes. I'm not sure how much the book did for helping my son through the day, but I can tell you that I am pressing my palm to my cheek right now and feeling just a little bit better.
I would recommend this book to anyone with children. Whether you have already sent them off to school or not. I wouldn't even consider it a requirement to read it to them however I also recommend you have some tissues handy.