I have a few things from childhood. I had more before but I gave most of the stuffed toys to charity.

There's nothing wrong with being sentimental. I am too. Probably too much so. I mean who keeps notes scribbled between 13 year olds? Oh, yeah, me. And I tortured myself about it over and over throughout the years. I mean seriously, what possible use do they have? Well, when the other person in the note exchange up and drops dead and all you have left of your time together are memories and those notes....well not so silly anymore, right? Keep being sentimental and keep hanging on to your childhood. :)