Please excuse my beat up old bricks. :P I just used what I had to show you a quicky inexpensive rocket stove that you can set up in just a few minutes. These bricks, obviously, wouldn't last very long. Fire bricks would be the best option.
You need, minimum, 14 full bricks and 2 half bricks. You can use all full bricks, but two will be sticking out. No biggie.
There are many different ways to make rocket stoves. Just do an on-line search. Some people use cans, buckets, cement blocks, etc. Here is a web site that shows you how to use cans. (click here)
these 4 landscaping blocks that I had.
pulled the extra brick off from the front (that holds the
sticks in nicely) to let more air in too since there was
no breeze today. I put three small rocks at the edges
to hold the pan up to let more air in, which worked
blog post that includes Pine needle tea. (click here)
...and another talks about Chaga from
Birch trees. (click here)