Do you want a summer job at CERN? By participating in the summer student program, you get the opportunity to work in an interdisciplinary group that has work assignments related to the experiments at CERN. The program lasts from two to three months, and during the stay, teaching in theoretical and experimental particle physics and computer science will be held.
In total, there are about 130 places for summer students, but only a few of these places are allocated to Norwegian students and to be able to apply for this programme you need to fulfil some requirements. You will need to have Norwegian citizenship or citizenship in one of the member countries. You will also need to have completed at least three years of an engineering/master's degree in engineering. The application deadline for the summer student program is normally in mid-January.
For more information, see CERN's official Student Programs page and go to "Summer Student".