![Image](http://www.ice-agency.com/ice-dry-ice/p-dryice.jpeg)
I'd prefer just stick to a fog machine. Dry ice isn't the safest thing to keep laying around. Not that it'll last long.
![Image](http://www.graeters.com/images/Final_Dryice.jpg)
And, the reason it is not 100% safe because since it is so cold, dry ice can cause severe frostbite and permanent skin damage, if you hold it in your hand.
![Shocked :shock:](./images/smilies/icon_eek.gif)