The Instructables is a really nifty site and has all kinds of ideas for the consummate do-it-yourselfer. All sorts of interesting projects there. I found this one to be really cool. It would be a good project to do with your children.
How to make fire with… water!
The principle is to use water as a Fresnel lens. It is not complicated, with a little training, we start a fire in 1 minute!
To start a fire you need 3 elements: an oxidizer, a fuel and an activation energy.
The oxidizer will be the oxygen contained in the air, the fuel will be the tinder and our activation energy: the sunlight that we will concentrate in one point thanks to water.
Step 1: Components and Tools Needed
– A transparent plastic bag
– Tinder (in this I used sawdust and crushed coal)
Step 2: Preparing Tinder
One of the most important things when one wants to ignite a fire is the tinder. That’s 50% of the work.
For this, I used sawdust and crushed coal.
– saw wood and recover the sawdust.
– crush coal.
– put in a nest of dry grass, or in a bark for example.
We will now prepare our fresnel lens made of water.
– Put the water in the bag.
– Forming a carrot by twisting 3 of the corners of the bag.
– Tighten the bag to have an almost sphere.
-Now that everything is ready, we can light the fire.
– Hold your sphere of water above your tinder and move it gently in order to obtain a concentration of light in 1 point as bright as possible, almost white.
– When smoke starts to appear do not stop! Continue until there is a lot of smoke.
– Blow gently on your ember.
– Add more wood bigger and bigger
Now you know how to light a fire with water! Congratulations!