Now, here's a product that I can actually say I've had as a youth.
Kenner's Give-a-Show projector launched in 1959, and I have a memory of having one of the early 1970's models as a kid. I say that with some certainty because I remember having a Josie & the Pussycats slide or two included in the package. Suffice to say, it didn't last very long, because once the battery ran out, it was never replaced.
Today, the projectors are still being made, but for overseas markets, and Hasbro, which took over Kenner 25 years ago, doesn't produce it for US markets anymore.
Here's a commercial from 1968, featuring Kenner's Gooney Bird mascot, who would be retired six years later.