My favorite was unwrapping Black Cat firecrackers, filling the interior of my Hotwheels/Ertyl/Matchbox/Dinkys with "gunpowder" & igniting them so they burned.

Fire, fire, FIRE!

Thankfully I grew out of that, didn't become some crazy arsonist and finally bought a VX becoming semi-useful member of society. YAY ME!!!

(Never could make myself to destroy some of the greats like the Jag E-Type, etc, so I guess there was always hope.)