Ann Makosinki, a high school student from Victoria, B.C., went all the way to the Google Science Fair this month with her project, the 'hollow flashlight', and she took home one of the top prizes of the fair.

The hollow flashlight she developed uses no batteries. It uses just the temperature difference between the palm of a person's hand and the air around them to, needing only a few degrees difference to generate electricity and produce light. This innovative idea is just one she has for the developing field of 'human energy harvesting' — gathering useful electricity from our movement and body heat, as we go about our daily lives.

http://ca.news.yahoo.com/blogs/geekquinox/b-c-teenager-takes-home-google-science-fair-170746340.html