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[swarmee]

My entry: Always loved opening packs of baseball cards when I was a kid. My dad loved to make things out of wood, so when I had too many cards to fit in a shoebox, he made me a 3x800 card wooden box to store them in. I would spend hours sorting them by team, set, player, etc.
When the '89 Fleer Billy Ripken card got out (I was 10), I showed it to my parents and told them they should invest in this card. It was about $50 at the time. They bought a copy and put it away for safe-keeping. When the card went up to $120 a few months later, I recommended they sell the card. They decided not to. It's still somewhere in their house. I learned the concept of a "fad" and "taking profits" that served me well when Ty Beanie Babies were popular: I made $2000 by buying and selling the retired toys and cashed out when I saw the first down arrow in a price guide.
Dad passed away last year, but I still have the wooden box and store some of my T51 graded card set in it! ;-)