it just takes AAs or AAAs for the smoke evaporator, the ring function is simple enough-
cylindrical chamber at front of device is where the magic happens- rubber diaphragm at the back, small-ish hole at the front (hole is roughly half the radius of the chamber)
holding the handletrigger fills the chamber with smoke, so that you can see the ring at all..
pulling the trigger results in a flat piece of plastic lightly thunking against a rubber diaphragm (black plastic and green diaphram in the image), sending forward the ring
you can also find much larger air vortex cannon 'bazookas' that lack the smoke function but are large enough to send farts and disturb paperwork across the room
cylindrical chamber at front of device is where the magic happens- rubber diaphragm at the back, small-ish hole at the front (hole is roughly half the radius of the chamber)
holding the handletrigger fills the chamber with smoke, so that you can see the ring at all..
pulling the trigger results in a flat piece of plastic lightly thunking against a rubber diaphragm (black plastic and green diaphram in the image), sending forward the ring
you can also find much larger air vortex cannon 'bazookas' that lack the smoke function but are large enough to send farts and disturb paperwork across the room