“…The influence of play on the development of the executive functions (EFs) in preschool children has been widely studied ( Blair and Diamond, 2008 ; McClelland et al, 2010 ; Diamond and Lee, 2011 ; Lillard et al, 2013 ; Goldstein and Lerner, 2018 ; Bukhalenkova et al, 2020 ; Thibodeau-Nielsen et al, 2020 ). A significant number of studies investigates how adults and child-adult interactions in play settings might influence the development of executive functions and support the idea that the self-regulation in early development is deeply embedded in the child’s relations with others ( Hakkarainen et al, 2013 ; Fleer et al, 2020 ; Van Oers and Pompert, 2021 ; Veraksa and Veraksa, 2021 ; Veresov et al, 2021 ). At the same time, interesting new play-focused curricula emerged, for example, the Tools of the Mind ( Bodrova and Leong, 2001 , 2017 ) and playworlds ( Lindqvist, 1996 ), both originated in Vygotsky’s theory of development.…”