Can anyone recomend a book which I can buy for my 2.4 year old ds as I have recently put his bed in his room and he has slept in it twice but keeps getting really upset and wants to go back in his cot. It's not a rush thing but I do have a baby on the way so will need the cot - I thought a book would be a good idea to read to him about a baby boy going into a big boy's bed - any suggestions? Thanks in advance..