ADD/ADHD is difficult to diagnose in young children.  All children develop at their own pace: while one child may reach milestones such as walking at a certain age, another child may not walk until a few months later.  Both however, may be considered to be within normal range.  It is also typical behavior for children to act without thinking of the consequences, be highly active and have short attention spans.  Given this, doctors may have a hard time distinguishing between normal childhood...