A simple dust protector for a Europlug power outlet. It is noticeably bigger than a regular Europlug and designed to provide a snug fit, as a regular plug size would be too loose without the support of the pins. Since prints and outlets can vary in size by a little bit this thing might be too big to fit some outlets, reducing the print size by a few percent should help.
This design is based around the Europlug sockets found in German power strips.
This thing is not meant as a child safety device and can relatively easily be removed with just fingers.