Demonstrates how to make a “cloud” by building up water vapor and air pressure in your mouth.
Following this link to view the video
http://thekidshouldseethis.com/post/how-to-make-a-cloud-in-your-mouth-physics-girl
http://thekidshouldseethis.com/post/how-to-make-a-cloud-in-your-mouth-physics-girl