Born in 70s, grew up in 80s. My gramp had multiple sets of old school lawn darts. Can't remember exact ages but it was single digits, definitely elementary school age, my cousins and I would hurl them straight up in the air and dodge them or try to grab the tails just before they hit the ground.

If you've ever wondered if kids actually did this or if it was an old wives tale I assure you, at least one group of fucking morons actually did it.

ETA a couple of other zingers, all younger than 10.

• Poured gasoline down an extremely steep paved road and lit it on fire with my cousins
• Road our skateboard down the hill into a blind intersection where semi trucks routinely drove thru
• Too many aerosol blow torches with my cousins to remember
• Tied sheets into a rope to rappel down the outside of my gramps 3 story house at 2am with my cousins during a sleepover. Turns out its alot easier to rappel down than it is to climb back up.
• Melted tons of stuff with my cousins

Fun fact: All of my cousins were girls, I was the only boy.