Tell us about yourself!
Skeletons Climbing Your House's Walls
Start a Back Yard Honey Bee Hive
Make a "Marble" Table From Concrete
I haven't attempted yet but it appears the grinding can be pretty intense depending on how you want it to look, i.e. level of aggregate showing. There are youtube videos describing this process in detail.
Table Saw Class
Double Fermented Kombucha
Automated all grain electric beer brewery for 100 €/USD