Hi,
I've been in your situation (too many times). When my girls were little I did have a book. I tried to find it to get the name for you, but sorry I can't find it. Try looking on amazon. I just did and searched "moving day" and several children's books came up. One thing I was told to do by somebody who moved with small children was to take them around the house on the last day and say goodbye to the rooms. I did that, but I have to be honest it was emotional for me more than them. I am not one for change and neither is my oldest daughter. It is really tough but you will move through it. Your daughter is still young and she will create memories of her new home and, unfortunately, forget the old. My youngest was 3 1/2 when we moved and she is now 8 1/2 and she has a few memories, but not many of our old house.
Good luck with your move!