This app for the iPhone is so fun. It's 99 cents but the way it
works, we all get to use it on our phones on our family plan.
Anyways, he repeats after you in a funny voice and you can tickle
him. We justified the purchase by (e:Matthew) saying the kids would
like it.

Ah, the joys of searching for that tip-of-the-tongue word. Honestly, I don't think I have ever seen a viewmaster much less own one. I faintly remember something like it but it had just 24 pictures of Delhi and was handed out at one of those sucker bus tours of the city when I was 2 or 3 years old. You couldn't put anything new in. I think it got water damaged and smashed later so it BECAME a kaleidoscope...
(That was actually a cool little google challenge... I couldn't think of what they were called, and it took me several tries to get the right descriptive words... "picture disk toy" was a big fail, as was "fisher price 70s toys". "toy camera story pictures" didn't work either.
I vaguely remember a Donald Duck story with mine in the '70s, "story viewer toy" got me Toy Story (the movie) but the "shopping results" gave me a current version - it didn't look like mine but definitely the right concept and the right word... ViewMaster!
:::link:::
Collector/museum site
:::link:::
I think (e:metalpeter) is describing a classic ViewMaster! :::link:::
A kaleidoscope?
He Isn't a toaster he is one of the those toys that you look through the eye things and you put that round disc in and see pictures he even has that front slot and his back is the eye piece.
Is he a malformed toaster?