View Master
Everyone had one of these things, even if they didn’t know what it was called. A View Master was a toy that allowed you to look at slides. It was pretty much the toy version of a slide player but much less entertaining. You’d look at the slides once and that was that.
But for some reason, there was no household that didn’t have at least one of these. You’d borrow your friend’s View Master and look at their slides once before commenting, “Cool,” and putting it aside to play SNES. At least, that was our experience of the View Master.