Its not a baboon, but it does sound like a dying duck.
Two 2x4s were hinged together and slapped against each another by yours truly in the attempt to make a sound like a whip in our Sleigh Bells rendition. My hair flew backwards and my expression became pinched each time I slapped them together.
Colored plastic tubes you hit on the ground.
A mini trombone used to annoy parents, siblings, etc. Sounds like this.
Dude. Do us a solid. Add your own funny instrument.
An instrument comprised of two horse hairs stretched across a hog's behind and picked by one's teeth.
A small flute pitched an octave above a regular flute. Fun to say.
Kudos to John Philip Sousa for this wrap-around horn.