(Image from here)
I keep dropping the eye spy ball, but here I am this week, ready to play.
I used to collect stamps. I'm not sure why exactly. Some adult got me into it and got me started, but I can't remember who it was. I used to get given scraps of envelopes with the stamps affixed and I would soak them in hot water and peel them off. Does that still work for the modern "sticker" stamp? I could try it out, but I don't think I will.
I also used to collect rocks. Not your everyday rocks, semi-precious stones and so on. My favourite lump of mineral was my "snowflake obsidian". Not sure where that is now.
Yes I was (am) a nerd.