With Radio Shack filing for bankruptcy, lots of geeky toys may go with it. Yes, the TRS-80 may be long gone, but so have most computers of that era. The thing I remember playing with was their electronics kits. These were simple introductions into circuits. Using spring terminals, you could build an AM radio, or morse code key, or 150 other projects (or more, depending on the exact set you got). About half mine actually worked, but it was a good way to spend an afternoon.
The spirit of this lives on, however, in Snap Circuits, which my daughter is even more fascinated with than I was the Radio Shack kits. Rather than a box of loose parts and springs you have to connect, each component is encased in plastic, with connections made with snaps. While it means you don’t actually get to hold a resister, you’re less likely to lose the part, and the projects seem to have a higher success rate–it’s not as finicky as the spring terminals. Many of the old projects of the Radio Shack kit are present, and some versions even have a computer interface. It’s a great toy to encourage an interest in STEM fields, not that I have much trouble encouraging that with my daughter.
My wife related a story where she was not the only one exploring electrical engineering.
Beso is a watcher. He likes to sit off to the side and observe what my daughter does. I often wonder if he has a notebook in which he jots his observations about life, in a manner like Thoreau. A week or so ago, my daughter was playing with her Snap Circuits. As pictured, Beso sat in the box lid, intently watching what she was up to. She made a circuit which had a switch, and an electric motor that turned a fan. She flipped the switch a few times, and had the fan spin, then stop. She then got up for a minute, leaving her project.
Beso took the opportunity to walk over and examine the breadboard. He sniffed around the motor, then put his paw on the switch and pushed. He wasn’t quite catching it, but it was clear he was paying enough attention to determine that’s what made the fan go. He tried from one side, then the other, only giving up when my daughter returned.
I’m not sure you’ll have the same result with Snap Circuits with your cats. However, I can certainly endorse it as a great education toy for the girls they love.