memories

Baseball cards or other sports memorabilia (important trophies, baseball glove, football jersey...that kind of thing).

ETA - high school girlfriend! ;)

their "security" blanket

the padlock to their locker!

and the musical instrument they played. :)

Mine has a teddy bear, but this one saves EVERYTHING!

A collection?

Mine still has his hockey skates, even though he hasn't been able to skate in 35 years, and I have no idea how many YEARS of "The Hockey News" so I am going to go with sports memorabilia.

Their girl (wife). I was thinking baseball glove, too.

Letter jacket.

Best friend!

Sports equipment - like baseball glove.

Mine still have their scout uniforms. Sporting equipment, like baseball gloves, uniform shirts.

a sports trophy

a pennant from their favourite sports team

I can't think of anything. I will guess model cars.

Best friend, I like that one. Very good funkyart.

I have to agree and to comment. My DH who is 62 still has his best from elementary school.

66%? Tough one. My first thought is baseball glove but I don't know if that many guys had baseball be that important. I asked DH and he said how about a birth certificate. So credit goes to him if that is the right answer.

Class ring

I was thinking best friend, too.

School photos.