Alfalfa delivers his note to Spanky via paper airplane, and as soon as recess begins the two boys stop Buckwheat and Porky at the door and offer to trade a magnifying glass and a water pistol for the firecrackers.
When Buckwheat and Porky refuse their offer, Spanky and Alfalfa sneak into the janitor's office and borrow his clothing to disguise themselves as an adult.
Alfalfa runs around the classroom with smoke and flames trailing him, and then outside where he puts his rear out in a washtub full of cold water.
As he's awkwardly reveling in the pleasure of being extinguished, he slowly opens his eyes and turns to see his entire class and beautiful young teacher staring at him in his private moment of ecstasy.
John Collum, Rex Downing, Barbara Goodrich, Paul Hilton, Sidney Kibrick, Dickie De Nuet, Donald Proffitt, Joe Straunch Jr., Jerry Tucker