The science pros at TKOR build a giant smoke ring toy to study air vortex motion.

Toymaker Wham-O created the Air Blaster, a plastic pistol equipped with an air pump and a large funnel in place of a barrel, in 1965. The lucky kid who owned one could fire a powerful ring of air that ...

Vortex guns capable of firing doughnut-shaped rings of air have sat around as toys or oddball gadgets for years. Now a U.S. lab has added an extra kick with electrically charged rings that could clear ...