I had a Radio Shack computer in the early 80’s. When I sent in the warranty card, my address ended up on nerd mailing lists. Compuserve was the only public ISP and access cost $7 and hour IIRC plus it was a long distance call around 50 cents a minute (ask your grandparents). I was able to access the internet for free at public libraries. Had no idea what I was doing but managed to see weather predictions and access Nexus which was a digitized database of periodicals (magazines).
A large magnet. I bought it on a whim ~20 years ago for $20 (still online for same price). I got it on a whim while buying gifts from an educational toy website. It comes in handy whenever I drop something small that ferrous or just need it to hold onto things.