Table 1.

Overview of the thematic modules in the STARKIDS intervention

Overview	Concept(s)	Educative/interactive texts	Animated films	Reflection tools	Serious games
STARKIDS Start
Introduction to the program	/	X
Information about weight development in childhood and adolescence	/	X	X
Introduction eating and drinking	- Meal frequency and timing - Drinks, with emphasis on sweet beverages - Composition of a healthy diet - Frequently asked questions about drinks and foods	X	X	X	X
Introduction activity and media	- Benefits of physical activity - Adequate amounts of physical activity - Opportunities for physical activity and opportunities to discover new places for physical activity - Dealing with barriers and obstacles for physical activity - Adequate times of media consumption - Identifying marketing mechanisms for unhealthy foods and drinks - Tips for media consumption	X	X	X	X
Introduction family life	- Family as a support system - Listening to each other - Joint family activities - Eating meals together - Consolation and reward (other than food)	X	X	X
Introduction in mindfulness	- Basic information about mindfulness and how it can support a health weigh development process	X			X
Eating and drinking
Information about the dietary concept in STARKIDS	- Why strict diets do not work - What is different in STARKIDS	X	X
Meal frequency and timing	- Information on meal frequency and timing - Frequently asked questions on this topic	X	X	X
Drinks	- Drinks, with emphasis on sweet beverages - Frequently asked questions on the topic	X	X	X	X
Primary focus: energy density	- Explanation of the dietary energy density concept - Practical use of the dietary energy concept in daily life - How to make clever food choices based on the dietary energy density concept - Frequently asked questions on the topic	X	X	X	X
Portion sizes	- Information about adequate portion sizes - Examples and tips for choosing adequate meals and snacks	X
Tips for everyday life	- Tips for grocery shopping - Frequently asked questions about everyday meals - Information about the Nutri-Score	X	X
Uncontrolled eating	- Information about binge eating, emotional eating, night eating, and grazing - Strategies for avoiding uncontrolled eating - Information for further help in case of eating disorder pathology	X
Mindful eating and drinking	- Information about how mindfulness can support healthy saturation and indulgence	X			X
Activity and media
Enjoying physical activity	- Information about fitness, energy consumption, and bodily reactions to physical activity - Supporting the fit between individual motives and corresponding possibilities to be physically active - Overview of different types of sports and exercise - Offering autonomous activity choices	X	X	X	X
Exploring locations for physical activity	- Tips for different locations for physical activity - Information about cycling - Strategies for integrating more physical activity in everyday life - Reflecting individual locations for physical activity	X	X	X
Being physically active together	- Considering possible buddies for being active together, e.g., in clubs, with family members, in the neighborhood - Promotion of family activities - Illustrating role models from the obesity context to enhance the feeling of relatedness	X	X	X	X
Becoming physically active (in daily life, in leisure time, in sports clubs or schools)	- Information about age-appropriate amounts of physical activity - Tips for keeping motivated for physical activity in everyday life - Summary and tips for parents to support their children/adolescents - Reflection of and individual feedback about the amount of weekly physical activities	X	X	X	X
Media consumption	- Information about the age-appropriate amounts of screen time - Tips for children’s media consumption - Identifying marketing mechanisms for unhealthy foods on TV, social media, grocery shopping - Introduction to compulsive gambling and further help	X	X		X
Mindful activity and media consumption	- Information about how mindfulness can help through a balanced amount of activity and rest	X			X
Family life
Strengthening family life	- Listening to each other - Talking about difficult topics - Strengthening family cohesion	X	X	X
Dealing with stress	- Associations between stress and overweight/obesity - Identifying emotions - Possibilities for dealing with difficult emotions, negative thoughts and stress	X	X	X
Sleeping habits	- Associations between stress, sleep, and weight increase - Tips for helpful sleeping habits	X	X		X
Weight stigmatization	- Individual appearances - Tips for dealing with stigmatization	X
Self-worth	- Developing a positive relationship to oneself - Strengthening a positive body image	X			X
Mindful dealing with oneself	- Information how mindfulness can support personal changes and healthy sleep	X			X
STARKIDS Keep on
Reflection of the last year with the STARKIDS program	/	X
Dealing with setbacks	- Identifying risk situations and setbacks - Reflections of strategies against setbacks - Strategies for sustained change	X
STARKIDS Joker
Strengthening motivation and commitment	- Reflecting individual obstacles and reasons for staying with the program - Developing strategies to strengthen commitment - Tips for introducing change one step at a time	X		X	X