On the other hand, Vygotsky thought that children could be assisted in moving from their level of performance to a level of what they could have a potential of doing. Vygotsky believed the zone of proximal development was created through play which was when children could, "operate at their highest possible cognitive level" (Smidt, 2006, p. 46). As children make sense of the world around them Vygotsky thought that those who expressed themselves through imaginary play stood a 'head taller'.