Caregivers create curriculum out of play by

· A curriculum out of play is an educational strategy that seeks to include activities oriented towards the early childhood study schedule. This type of strategy seeks to teach children through play and games coordinated by teachers.

An epidemic is a large and localized outbreak of a sickness or disease.  a pandemic is a large global outbreak of a sickness or disease. 

Because without physical activity, the body has extra "energy" if you will, and so when it is time for bed you are not tired, so you end up staying up all night. also there is probably an effect on your internal clock, which messes with your melatonin production which goes hand in hand with your sleep cycle