Beyond Saying “Gracias”: Enhancing the Understanding and Expression of Gratitude in Elementary School Children through a Game-Based App

The cultivation of character strengths like gratitude can enhance children’s well-being and prosocial behavior. While school-based interventions exist, there is a lack of rigorously evaluated, gamified tools that explicitly teach gratitude to preadolescent children. This study evaluated the effectiveness of Grati y la Isla de la Gratitud , an educational game to enhance children’s understanding and expression of gratitude. Using a mixed-methods, quasi-experimental design, we worked with 304 children (aged 9–12) from public and private schools. Pre-post and post-only measures demonstrated that the intervention group displayed significantly more complex understandings of gratitude, incorporating more conceptual elements (benefactor, beneficiary, benefit, effort) in their definitions and reporting a greater variety of gratitude expressions (verbal, concrete, connective) compared to the control group. Qualitative analysis of interviews with a subset of 17 participants showed that children successfully identified gratitude elements and expressions within the game’s narratives and transferred them to personalized “gratitude plans” for everyday life. Participants also reported high levels of satisfaction and perceived educational value from the game, although some noted challenges with specific mini-games. The findings indicate that a gamified intervention can improve preadolescents’ conceptual and practical understanding of gratitude, offering a digital tool for character education in school settings.