Re: Odd
Same here. First, I discovered that microphone worked as a speaker, when I was about 7 year old. Later, I used some earbuds to record sound onto a Mac LCIII at school. Certainly not hi-fi quality, but speech was comprehensible.
Same here. I made a tin-cans-and-string replacement at that age using only two 150Ω speakers and 25m of cable - no batteries or electronics needed :).