Blow Piano

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A 60’s Hohner Melodica.
Which Hohner invented in the mid-1950’s.
Is it a piano, or is it a wind instrument?
My test with a ten-year-old piano playing kid makes me think it’s closer to keyboard, as he could play a simple tune within minutes of seeing it.
It’s such a nice shade of green, which I’d call Zesty Avocado.