Until Professor Snail is rescued from the nearby cave, the office remains empty with no interactable elements. After the rescue, donate fossils at the office work desk or answer the Island Surveys posted on the wall to receive Golden Walnuts.
Professor Snail is seeking the mummified bodily remains of two different creatures and all the skeletal pieces of two more to construct a display about the natural history of the island. Multiple fossils of the same kind may be required to complete the skeletons.
The player can receive a hint about the location of a donation item by using the donation interface and choosing "Hint".