Have you seen... [smoke rings & bubbles]

When air in a container is forced through a circular opening, the edge of the opening will create a vortex ring.
Wikipedia helps illustrate what a vortex "looks" like:

In the real-world, we can see this turbulent effect in smoke rings - the particles make the phenomenon visible.
But why let smokers have all the fun, when you can make or buy a vortex ring bazooka!  (Smoke not included.)

Here is Ellen having fun with an easy, homemade air vortex contraption on one of her shows:

In rare cases, a volcano will create a massive smoke ring sending it hundreds of feet into the sky:

A completely different playground activity usng air with another material is the creation of soap bubbles.

Soap film "stabilizes" the surface tension of water and makes sustained (short-term) structure possible.
Like oil on water, the colors we see are created by reflection and refraction of light on the surface.
The light's frequency (phase) is shifted differently, based on the thickness of the soap film on the bubble.

It's a favorite children's activity, but in the second video a "bubble artist" shows just how far this can go.
He creates "doughnut" (torus) shapes, bubbles with smoke in them, and bubbles within bubbles.
And he got a grant from the U.S. government to mess around with bubbles too - why didn't I think of that?