“They made them into weapons”
They were able to work better when they were warm than when they were shivering with the cold.
They found more time to improve their tools and weapons.
One day they began to make weapons of the bones they found in the cave.
Many of the bones were good for clubs.
Others were good for handles of weapons.
After the Cave-men had sorted out the bones that they wanted, they went to hunt stones along the margin of the stream.
They wanted stones that were good for hammers.