The purpose of the current study was to look at whether a child's activity level was correlated with the level of stress a mother experiences. Parents can describe their children as having distinct and recognizable patterns of behavior as young as in infancy (Paaren, Hewitt, Lemery, Bihun & Goldsmith, 2000). Even at birth, some children are much more challenging to parents, while other children are notably more easy going and carefree (Oliver, 2002). Since parenting involves the relationship between a child's personality style (temperament) and the parent's response, the relationship is a reciprocal process in which parent and child are constantly affecting each other (Suarez and Baker, 1997). It was hypothesized that child activity level would correlate positively with the level of stress a mother experiences. When mothers rated the activity level of their most active, pre-kindergarten aged child, results revealed that the percentile of mother stress was positively correlated with child activity at a statistically significant level (r =.294, p < (less than).05). The relation of parent stress and additional demographic variables (e.g., family income, number of children, marital status) was analyzed, resulting in insignificant results. Appended are (1) Activity Level Scale; and (2) Questionnaire.