I restricted my pranks to stacking up some 7.62mm machine gun ammo on top of a firelighter brick, setting fire to it, then running off and hiding behind a tree (age ~ 9).
Wow thats a bit naughty, how did a 9 yr old get 7.62 rounds?
A much older me (teenager) with friend whose father was a black powder nut, filled a toilet roll with black powder (wrapped in roll of duct tape) improvised a fuse and got the shock of our lives.
still have all 11 fingers....