Mine was our CRT TV. I would rapidly push the power button on and off because I thought the picture coming and going looked cool but eventually it fell inside of the TV. I think I later stuck a magnet on the TV.
Not looking for Reddit answers like “My parent’s marriage”
In grade 2 I burnt down a shed causing $2000 damage in the 1970’s. (Around $10,000 in todays money)
I was playing in the shed and decided I wanted to build a fireplace… out of wood. (In my defense it was a type of laminate, so I didn’t know it was wood at the time.)
I nearly did something similar. My friend and I found a lighter and didn’t want to get in trouble for burning stuff so we did it under his porch.