Fun song to play. I think the most famous version of this song was done by the
Weavers (Pete Seeger's old band). Here's a pretty basic flatpicking arrangement. Enjoy!
G C E|----3---3-------3-----3--|----0---0-------0-----0--|B|-0--0---0-1--0--0-----0--|----1---1-------1-----1--|G|----0---0-------0--2-----|-0--0---0-2--0--0-----0--|D|-------------------------|-------------------2-----|A|-------------------------|-------------------------|E|-------------------------|-------------------------|
G D7 E|----3---3----3--3--------|----2---2-2-----2---2-2--|B|----0---0----0--0-0/1--0-|----1---1-1-----1---1-1--|G|----0---0-0--0--0--------|-2--2---2-2-----2---2-2--|D|-0-----------------------|-------------0-----------|A|---------------------------------------------------|E|---------------------------------------------------|
G C E|----3---3-------3-----3--|----0---0-------0-----0--|B|-0--0---0-1--0--0-----0--|----1---1-------1-----1--|G|----0---0-------0--2-----|-0--0---0-2--0--0-----0--|D|-------------------------|-------------------2-----|A|-------------------------|-------------------------|E|-------------------------|-------------------------|
G D7 GE|----3---3-3-3--2--2-2-2--2-2--|--------------|B|----0---0-0-0--1--1-0-0--1-1--|--------------|G|----0---0-0-0--2--2-2-2--2-2--|-0...---------|D|-0-------------0--------------|--------------|A|------------------------------|--------------|E|------------------------------|--------------|