This is earned for finding optional collectible #3. If missed on the first run, you can "Play Episodes" and select specific parts of the Episode in order to find the missing optional photos through collectibles mode
. The following collectible is described and can be seen in the video below at 3:00:
After work, walk back to camp, and Finn will sit down by a tree. Speak to them. They will carve a stick and throw it over their shoulder. Pick it up.
Getting all 6 collectibles in this episode will also reward you with the following: