The boy in the commercial tries to cut the hard bread made out of rye with his knife (Finnish knife called 'puukko'), but fails. The boy even cuts his finger with the knife, but the rugged dad just glances at his son and asks "Well, are you hungry or not?"
The rye bread is popular bread in Finland, and Finns are always surprised (and amused) how little people in other countries use rye when baking their breads. The rye bread can be dried when it becomes crispbread style bread, and it can be stored for months. This was a great help during the long Finnish winters, when there was only little food available.
Rye bread - http://en.wikipedia.org/wiki/Rye_bread
Oululainen - http://www.oululainen.fi