We got a fun letter the other day at IBI from a teacher, Darlyn Wendlandt, who had her students build and fire the biochar kiln that I have documented on this site. It was hard for me to get all the materials together and build the kiln, so I am very impressed at what these high school students have done. The welding class did the welding work.
Here is a video of the test firing. And the cookie-eating!