My first thought about this was wow, 5 years of e-mail backlog is a lot to get caught up on ;^). Actually, I think it will be a wonderful gift your son will cherish for his entire life. It used to be rare for anyone to get any insight into what their life was like when they were very young, save for possibly a few photos/videos and memories of family members, but now the technology is such that everyone should be able to have access to these kinds of views into their early days.