Play is not frivolous: it enhances brain structure and function and promotes executive function (ie, the process of learning, rather than the content), which allow us to pursue goals and ignore distractions. Furthermore, play supports the formation of the safe, stable, and nurturing relationships with all caregivers that children need to thrive.
Research demonstrates that developmentally appropriate play with parents and peers is a singular opportunity to promote the social-emotional, cognitive, language, and self-regulation skills that build executive function and a prosocial brain. Children need to develop a variety of skill sets to optimize their development and manage toxic stress.