Remeber the View Master? I still have my childhood one with many envelopes of dics. I'm pretty sure Nanny and the Professor is one of them. I know I have Family Affair.
I had a bunch of Charlie Brown viewmaster reels. Seeing the Peanuts gang in three dimensions was always troubling to me, for some reason.
Also, fwiw, rapper Ludacris sent out Viewmasters with slides to some rock crits to promote his latest album,
Red Light Special. (I didn't get one, but I did get to see one. Funny guy.)