/diy/ - Do It Yourself

I have huge amounts of old keys in my possession after I helped organize things from my grandmother's old hotel. I want to use them for art projects to show respect for my family's history (long line of women owning and running hotels). What are some cool projects I can do with keys to do this? It's mostly the old type of keys (stereotype key symbol), but also some kg of the modern type (pic related). Also, what equipment do I need to create something like pic related?