“…Between 24 and 30 months of age, children reliably cooperate with each other in problem-solving tasks, but younger children do not (Brownell & Carriger, 1990). It is only during the third year of life, as the child's social understanding and language about self and other develops and they begin to care about social norms and rules of games (Rakoczy & Schmidt, 2013;Rakoczy, Warneken, & Tomasello, 2008), that social games become more coordinated and cooperative (Brownell, Ramani, & Zerwas, 2006;Eckerman & Didow, 1996;Verba, 1994). Indeed, by taking into account their partners' intentions and by monitoring, timing and sequencing their own and their partner's actions, children can adjust their behavior appropriately to attain a shared goal (Barresi & Moore, 1996;Brownell et al, 2006;Smiley, 2001).…”