Images
Adding an image to a page will always catch the reader's attention.
For example, you can add a picture of all the people in your group, a picture somewhere in/around the MPI building, or another image that is relevant to the information you are relaying.
The image can be up to 8 MB and the allowed formats are png, gif, jpg, and jpeg.
Of course, images are not mandatory and you certainly do not have to add them to every page. They are just a nice way to break up all of the textual information.