The Physics Faculty of University of Barcelona and CERN are collaborating on the organization of a one-week summer course for students in their second year of Baccalaureate (~18 years old). At most, 16 students will be selected from the attendants to the Physics Masterclass. The program will include talks by scientists at the physics faculty of the university and CERN and a program of hands-on experiments to learn about particle physics, electronics and radiation detectors. The students will build their own cloud chambers, measure radioactivity with hybrid pixel detectors (Medipix and Timepix chips) designed at CERN in the framework of the Medipix Collaborations, and will do experiments with electronic circuits to detect cosmic rays among others.