Dressed in a lab coat, a man going by the name of "Hazmat Bond" lined the boys of Cub Scout Pack 688 up against the gym wall at Shipley's Choice Elementary School to face the firing squad.
He raised something that looked like a leaf blower and took aim. As the amped-up boys awaited their fate, parents stood watching from the sidelines.
Class was in session.
The leaf blower was loaded with pingpong balls and Hazmat Bond was Matt Simms, an instructor with Mr. Bond and the Science Guys, a raucous, roving workshop that provides children lessons in everything from density (by using bouncing rubber balls) and pressure (a makeshift potato detonator) to gyroscopic...