When i found out you could pop capacitors plugged into a switched outlet boy we had fun
We charged capacitors up to 350V and then played hot potato.
Oh, heck, hook up a woofer with, say, cone damage, and with maybe a 2” voice coil to 60 Hz 120 VAC!
I harvested lots of Sprague "orange drop" capacitors from discarded TV sets as a teen. A great source of parts for the parts box. Resistors, caps, chokes. All neatly sorted for future use. One of the "future" uses was charging them up using a Ford Model T spark coil. Place the charged cap in a small paper bag. Leave it out on the desk and wait for the curious and unsuspecting to dump the part into a bare hand.
LED’s blow pretty well too.