Long Bone

Long Bones begin their existance in New Rock City as 'dropped' items.  They can be gotten by defeating Lizards and Pterodactyls in your city.  Harvesting crops and collecting resources will lure the enemy characters out into the open to be battled.

Long Bones are also dropped by clicking on the Lizard Jail which is made available by doing the Lizard Jail Quest Set as you proceed through the game.

And now a new feature introduced in May 2019 is the ability to craft Long Bones in the Mine.