Doorstop alarms were not odd. They are still available. From General Electric, at WalMart, no less.[1]

[1] https://www.walmart.com/ip/GE-Door-Stop-Alarm/10258356

Where can I get one of those mustache protectors?

--EDIT-- https://www.amazon.com/MoGuard-The-MoGuard-Mustache-Guard/dp... ...Everything is plastic these days. The silvery one looked much nicer.

Looks like there's also a metal one with a sweet carrying case (still not slivery though) --http://a.co/6yuAmGR

The funniest thing on that page is the "Frequently bought together" section. A moustache-twirling coffee mug?

My favourite ones from my own family history were the plugs to put into wall sockets to stop the electricity leaking out.

"Laying Down Glasses", heck, I could use a set of those. There might be the revival of a product idea here...

They still sell them: https://amazon.com/Prism-Glasses-Eye-Bed-Spectacles/dp/B000R...

I actually had something like this when I was a child. It was a contraption, like a periscope, made of cardboard, that you wore over your eyes (it fit over my glasses) to read while lying down. It worked great. As I recall, I ordered it out of novelty catalog.

Little guns are still a thing. They go boom, just like their bigger counterparts.