Like hearing yourself talk? wish you could see yourself talk? shine a laser at a mirror that shakes with your voice.
Step 1: Parts Layout
(1) ~6" of 1.5" pvc
(2) enough thin plastic to rop around an end of the PVC (typical sandwich bag is fine)
(3) small mirror (find a locket, or use a glass cutter on a mirror, or even use a small piece of polished metal)
(4) laser pointer
(5) tape (duct, I s'pose)
(6) some wood for a base plate