Principia is the alumni association of Mechanical Engineering at the University of Twente. This means that after your graduation, you can still stay connected with your old ME students and stay updated on what happens with the study and with Newton.
Next to that, they have several project groups in which you can participate actively with other students on durability and Senior Expert Support (a group where retired people share their knowledge and experience with younger people/ companies).
You can also become part of their board and help them organizing the activities and projects.
A yearly activity of Principia is organizing the Principia prize. A day is organized where several groups of ME students can work on a certain case that is found by Principia. The winner will win a big prize afterward!