Individuals with anxiety disorders were traced back to have onset before aged 5 years. Early intervention is important to target preschool and primary school children. The objective of this 14-week fieldwork was to explore how we can support young children's well-being in schools. The following research questions were identified to investigate this topic: 1. Did a 14-week 'build-to-play' approach lead to reports of reduced anxiety as reported by teachers, parents, and in observation reports from the researcher among a sample of 12 children (aged 4-6 years) who experience anxiety (n = 9) or anxiety and autism (n = 3)? 2. Throughout the 14-week approach, interviews with parents (n = 12) and teachers (n = 6), what were the co-construction of strategies to reduce anxiety? Twelve case studies in two primary schools in Dublin were conducted. We proposed to bring the approach to school settings as COVID-19 has accelerated the good work that children and parents may benefit more from the non-clinical settings. The theoretical frameworks were universal design for learning and bio-ecological model to design this 'Build-to-Play' approach as inclusive and developmentally appropriate for young children. The key findings related to education included outcomes of a reduction in childhood anxiety, improved social communication skills and executive functioning. More importantly, a collaborative understanding of what anxiety was and how to cope with it was established. For example, for children who had any risk factors of anxiety or additional needs such as autism (n = 8), a more intensive approach than the standard 14-week was needed to have better outcomes. Conceivably, this research would make an impactful contribution as change makers to educational practice, policy and theory.