You may have heard it in sci-fi/horror films or featured in TV shows like Big Bang Theory. Check this out!

X-Ray’s Theremin Museum is an interactive traveling theremin museum; featuring rare historic memorabilia + educational workshops & theremin petting zoos.

This is definitely a one-of-a-kind musical instrument that uses two antennas emitting electromagnetic waves; allowing the user to play musical notes & control volume with no touch — in mid-air!