Quiz update: Giddysinger is the only one who's guessed what instrument was played by both TMBG and KFME this weekend, and it wasn't so much a "guess" as the fact that he knows both bands. So, you people who have vague knowledge of They Might Be Giants: what instrument is played by John Linnell and might also be played by a trio that performs traditional Finnish and Russian music?
Hints: it's not a jingle bell stick thing; that was only They Might Be Giants. Also not a double bass, which was only played by the Karelian Folk Music Ensemble. Also not trombone (TMBG), harmonica (KFME), theremin (TMBG) or goat horn (KFME). Picture to follow when you're sick of guessing or everybody gets it.