It depends.
Even going somewhere for three months and not doing anything besides catching up with your own work left behind, while not talking nor making useful contacts with anyone there would be a succesful research stay.
Even going there, not doing anything for three months besides saving money from the scolarship can be considered a success (research&academia will unfortunately provide you ample occasions of unpaid spells, so saving money is a success indicator because you will do science on your own savings).
Research is failure. Think what is the greatest failure you can achieve in three months, then pursue the opposite in your pre-doc norwegian stay.