Fart, sing, clap, hum, rustle paper, snap gum.
In class, we only let them do it briefly, unless it's music class, when we make them make the right kind of noise.
"Our Miss Ramey, 1924" via Shorpy
Watch our cousins outdoors--the birds, the squirrels, even the bugs create a cacophony of chirping, chattering, and buzzing
Even a fruit fly hums to his lovers (followed by, well, licking..) And don't get me started on fruit bats. Ahem, back to noise.
Here's my anecdotal observation: kids who make noise in class (other than the one trying to disrupt) are generally the happy ones. Humming, singing, chattering away, despite years of admonishments.
Mammals love to make noise, and humans are pretty good at it. Most humans are pretty happy when they are singing for themselves, and until the last few decades, the only singing a child heard was that of those around them.
Today we "consume" music, and singing in public gets odd looks (unless you're very good at it and doing it for money).
I know--I'm a singing fool.
So to recap so far: