Electric Fan: It moves air.

The clear gas we breath and live in on a daily basis. It has no color, and it has no smell. It creates atmospheric pressure. It’s mainly composed of nitrogen and oxygen. AIR! Well, air is normally in a gaseous state. But it can also be liquefied. This can be achieved by pressurizing air and lowering the temperature. It becomes a liquid at approximately minus 195 degrees Celsius. To put it in perspective, water freezes at 0 degrees Celsius and rubbing alcohol freezes at minus 127 degrees Celsius. The basic use for liquid air is to maintain things cold. But for the liquid air to maintain it’s liquid state it must be maintained in a Dewar flask. A Dewar flask basically creates a vacuum between the inside and outside. It’s, basically, a flask inside a flask. This prevents the temperate from changing quickly.

Dewar Flask

It looks a lot like water.
Liquid air is, basically, liquid nitrogen with liquid oxygen.

Liquid Nitrogen

Here is a video on how to make ice cream with liquid nitrogen.
Here is a video of cold cooking. Cooking with liquid nitrogen.