I've always added some weird things to my books. But I guess that one that made me laugh the most was the pair of chopsticks for our dinner at Teppan Edo in Disney. Our first hibachi dinner!
I used clean fishnet, clean chopsticks that I painted red and covered with crystal lacquer and put in a V on the page and put the journaling inside, I've used cleaned very small beach shells... I think that's it but I'm not sure.
The most recent odd thing I used was a gift card holder from Chick-Fil-A. I did a project for a DT where we had to use something laying around the house. When my daughter broke her leg last year, she received SOOOOO many Chick-Fil-A gift cards. And strangely, on her first Halloween, she was a chicken. So I used the gift card holder as a tag for her chicken layout.