What makes a child a potential star athlete, or a lifetime couch potato? Most of not all 2 year olds seem to have perpetual motion engines, but already at this stage, there are active children who can't stop moving, and those who are much slower moving. A father is usually responsible for the active times in a child's day, so can the absence of a father make a child less active? Can environment hinder, or help, a toddler's growth and development?