In this case a relapse of a condition I had as a child - I've come down with a case of Electric Trains. It is often overlooked as a harmless hobby, but the fact is that acquiring and operating model electric trains can become a mania, one that takes over lives and breaks families apart.
I exaggerate, of course. And I never actually got into it on a railfan level, or invested great sums of money in equipment. But when I was in grade school my mother let me indulge in a small N gauge layout (2-1/2' x 5') and a nice little collection of locomotives and rolling stock. (N gauge refers to the size, in this case one of the smallest; appropriate for apartment dwellers, as you can fit a longer track in a smaller space. HO is the most popular, twice the size of N; and O gauge are the large and very detailed trains, and the most expensive.)
I got them all working again, including one that my long-departed uncle gave me, that never worked. Gail heard me across the room, zipping the little engines from one end of my desk to the other as I tested them. Well, that can only be fun for so long... I should really put up a simple oval of track and run them for a while. You know, just to keep them in good working order. I don't have any more track, but I bet I could find some cheap - on eBay! Yes, I went into the model train area on eBay, and yes, I found and purchased over 100 pieces of used track for a song. But I also found a zillion other electric train items, and I have browsed there endlessly since. (It's staggering to see how much people spend on this hobby; one perfectly-detailed O gauge train and coach set went for over $3,500!)