Are your parents always asking what you are actually doing in Delft? Are you a second-year student? Bring your parents to the Parents' Day on the 21st of April and show them everything that our faculty has to offer.
Your parents can sign up via the link in the letter you have received! As a student you can fill in the following survey: vsv.tudelft.nl/ouderdag/studenten.php. Note that this is NOT a registration form.