Do you have anything in your home that is completely useless, but you just won't throw away?

I've got all kinds of junk I've found while hiking over the years, sea shells found in a cave, funny painted rock. I've got some feathers from birds I used to own, from my Guinea fowl Gus and and Woodrow, they're dead now. Some fur from my cat Sebastian, he was always shedding and I got enough of it together to spin with my fingers into thread.