Utterly Mad

The trolls begin gathering materials, wood, stone, thatch, and tar. They use these materials to make houses, using the tar to make the thatch adhere to wooden planks that were erected to make the walls, and then two additional planks that were used to make slanted roofs.
They also use the stones and sticks to make hunting tools and proceed to begin gathering food using these tools. They also begin gathering local vegetables and using whatever seeds they find to begin making fields to grow crops.
(hoping this is okay)