We made an aluminium smelter from a broken vacuum cleaner and a bucket with a hole in it. :D
We were following the base instructions from Book 1 of the Gingery series.
https://gingerybookstore.com/MetalWorkingShopFromScrapSeries.html
When it came to making the casting forms, instead of making them from wood, we were 3d-printing them. :D
A chewy combination of ancient and modern techniques. :D