The closest I have have come to conducting a scientific experiment was when I was in vibration testing contest. I was eleven and my thirteen year old cousin said he could make atuning fork vibrate twice as long as I could. I took him up on the challenge and raided my piggy bank to make it interesting. The rules were simple. One bang on the fork stand it up on a surface and count the seconds. He whacked it on the table and it hummed for one minute and thirty-two seconds. When it was totally still, I whacked in on the same table but put on my upturned volume TV top and it might still be humming.