Larger than a trumpet, smaller than a tuba, sounds like a cow with a cold.
A mini tuba. Really fun to say.
An 8 foot long spruce horn palyed by Swiss goatherds.
A flute you play like a recorder, only your nostril takes the place of your mouth.
Hey! A little help here! Add your own funny instrument.
A gigantic clarinet with a range so low it is inaudible to humans. See also Unnecessary.
I.e., a toilet paper roll glued to the top of an empty tissue box and rubber bands as strings. See also Bathroom.
A German bagpipe.
I mean, how hard is this to play, really? Two spoons, hit them against your body. Not to be hatin', but how far is that from drumming on the car dashboard when a cool song comes on?