About the age of 7, I discovered the sound from a radio came from the paper cone of it's speaker. I reasoned that all the speaker needed was some electricity to play. I didn't understand the significance of all the other parts in the radio was, but still thought I would test my hypothesis.
I scavenged a speaker out of a discarded radio. Then cut the end off of an extension cord, stripped the wire ends and wrapped them around the terminals of the speaker. Upon plugging the cord end into a wall outlet, the speaker exploded, blasting the voice coil across the room, through the door and out into the hallway. I was totally astounded in wonderment as to how and why it did that. That was the beginning of my electronics design obsession and career.
My mom, very sternly, forbade me from ever playing with anything electrical again. Yea... that didn't work.