I still have personal things from childhood that I've saved. But you can't keep it all. Eventually, you have to decide which things to keep and which to get rid of. If you already have several pieces of memoriabilia for the same thing, chances are you don't need to keep them all.
In this case, I found a box I made back when I was in Cub Scouts, using glued popsicle sticks. It's practiaclly falling apart, and barely deep enough to put anything in. I don't think I ended up keeping this one.
Speeking of home-made crafts, I found a sheath made out of cheap leather stapled together, holding a steak knife. I can't remember if this was being toted around as a potential weapon back when I was a teenager, or ended up being used as an athame in my Wiccan days. Regardless, I have a extra knife in my kitchen draw now, and a piece of red leather in the trash.