I used to dial with the receiver hook from my dorm room in college (c. 1977) just for laughs. A dorm mate who used to work in a phone CO told me that he always knew when some numbnut was dialing ...

He connected the Arduino Mega’s LED output to a pair of LittleBits which then switch a servo between two positions. A bare servo wouldn’t be much fun, so [Outaspaceman] connected a tentacle ...