Bipolar disorder is a common, life-long, progressive disease that typically begins in adolescence or early adulthood and is associated with significant morbidity and mortality (Lish et al., 1994). Family studies have shown that offspring of parents with bipolar disorder have a 30% chance of developing a mood disorder, while children with both parents with a mood disorder (with at least one with bipolar disorder) have a 70% chance of developing a mood disorder (Goodwin and Jamison 1990). Indeed, children (< 18 years old) have an even greater risk for developing bipolar disorder if they have a parent with the disorder (reviewed in Lapalme et al., 1997; DelBello and Geller, 2002; Chang and Steiner, 2003). Since the clinical manifestations of bipolar disorder often present early in life and may worsen with age, it is imperative that this illness is recognized and treated as readily as possible. Bipolar disorder may have a number of prodromal or early-onset presentations that do not include syndromal mania. These prodromes may include cyclothymia, dysthymia, and subsyndromal manic, depressive, and mixed affective symptoms (Chang et al., 2000, reviewed in Lapalme et al., 1997).