The Vortex Cannon I built with a colleague at IBiB. was a big hit a the Rochester Makerfaire. Or, I guess it should be a big puff.

Some slow-mo action:

It was fun blasting out fog rings. However we discovered that if you pump it very slowly the rings will just hang in the air for an extremely long time. Makes me wonder if there is a good way to light them up while their just hanging there….

More improvements to come, the next event will be the Syracuse Makerfaire.