Abstract. In the context of the HANDS project [13], we argue that cognitive support systems designed for mobile devices may benefit from classical AI techniques as well as from Persuasive Technology. We investigate a system of stepwise instruction, called a Simple Safe Success Instructor, first in terms of scripts, and later in terms of Hierarchical Task Networks. The system under development is crafted for the benefit of young people with an autism-diagnosis, and the purpose is to support these in desired changes in attitude and behavior in dynamically changing environments.