There are certain tricks in life that you can use in order to turn normal things, like building materials, into amazing devices. All you need are some concrete or cinder blocks at your disposal, we will show just how easy and fast it is to make a 4-Block Rocket Stove. The secret behind such a simple build lies in the design of the block itself. Actually, there is no build required whatsoever, only a clever positioning of the 4 blocks of concrete. With a total cost of little more than $5, this way of making a DIY rocket stove will prove extremely efficient. Very little fuel, meaning twigs, leaves and small sticks is necessary and has shown to be resistant to harsh wind and rain.