Abstract
Volume 4 completes chapter 5 of volume 1 and presents, in addition to the "Ants" theme presented there, the themes "Bees", "Gaits" and "Labyrinths". It serves as a source for the planning and conduct of long courses and as a help for the selection and necessary preparation of a suitable special theme. Themes play an important role in the Roberta pro-ject, since the robot experiments are developed trough the study of the special theme. Attractive themes can serve to arouse the interest of girls.