Whittling

The term whittling can refer to carving an object out of wood using tools such as a chisel or as here using your trusty pen knife which he's doing at Camp.

You might do so to fashion an ornamental object as a crafts exercise or it may be that the object has a more practical application.

Apart from a good knife whose blades wold be made from tempered steel, a good sharpening stone used to ensure the blade is really sharp is recommended.