Lieberman (1966) identified playfulness as humorous, emotionally meaningful, novelty-seeking, curious, open and communicative. She created preschool worksheets of questionnaires to aid teachers to recognize playfulness in children as well as is divided into five sections.
In pre-schooling your children should be according to their speed. Instruct them according to their capability. This way, we can avoid them from being burn out. Stress and anxiety can disable their knowing capabilities.