Day 34: Kid's Memorabilia

What do you do with your kids' stuff?  I'm trying to figure out the simplest way to manage the clutter that comes along with children's memories.  Right now I am trying out using a 12x12" box with lid for their important papers, etc.  My goal is to purge through the more ineffective boxes and bags I have things stashed away in, and to reduce the volume of stuff (especially for my son who is almost 6!)

 Today's Toss:
1 folder of hospital papers from our 3 month old's birth
9 other random photos, papers, memorabilia from old keepsake boxes

Which brings up a question.  Should I count each piece of paper separately?  That seems kind of silly.  I'm kind of going back and forth.  Technically each thing is countable.  I could count it.  Most days I try to go for a bigger count, like a "folder" of paper, or a "stack" of paper.  I'm not going to try and be too technical about it.  Especially when it comes to memories of my pregnancies, deliveries and my kids' baby days.  *sigh*  I want to stay focused and be able to save a few important things which my children may want to have someday.  Am I saving it for them, or for me?  Where do I go for guidelines on this kind of stuff?
I'll continue this monologue later.