During 2 years of Peace Corps Volunteer service in Uganda, I started a social enterprise (link to page defining) in partnership with a non-profit called Positive Planet at the time (now BAMA).
Link to Brick by Brick page
Background on bricks
Mine is superior
Acquired presses, recruiting masons & co-manager, sales/marketing/execution
Oversaw 7 tank construction.
Still operating without my involvement - has built hundreds of structures from tanks, latrines, schools, apartments