Switch
My elegant made-in-Switzerland switch, which we all thought was an SPST toggle switch, is actually a momentary SPST normally-closed switch. It does make a lovely, satisfying click, though.
It seems that they make a DPST version -- there's some empty space in the switch where another pole would go. I'm happy that some kind person taught me the difference between SPDT and DPST when I was a child. So why not go and teach a child the same?