Imagine you are out in the wilderness, no matches, and you need to start a fire... Well no worries if you happen to have a 3'x4' Fresnel lens and the sun is shining brightly! Have you ever seen a rainbow colored solar powered fire? This is a great science experiment for kids to teach them about solar power and optics.
![](https://i.ytimg.com/vi/Zu4Rvek8j8E/maxresdefault.jpg)