Do you guys have any keepsakes from childhood that you can just never seem to throw away?

I still have my Pokemon cards in a binder, along with a ton of old drawings from when I was at least 7 years old of Dragon Ball Z and whatnot. Never once played with them (because who needs rules right?), but collected and traded with my friends a lot. Never ever got that Charizard... I remember the exact place during recess where the whole thing got started.

A collection of very old letters (Christmas/Birthday/greetings). Wasn't able to bring myself to throw them away then, can't now either. Some of these people I haven't talked to in over 11+ years and can't even remember their faces at times. They were some of my best friends though.

A smooth black rock. I picked it up from a trail during my elementary school summer camp trip. I opened one of my dresser drawers one day and, BAM, there it was just sitting there. That brought back a lot of memories. They're all hazy, but I'm surprised they're still there at all.

Nostalgia, GO!