Here are some Symptoms of ADHD according to KidsHealth.org

ADHD used to be known as attention deficit disorder, or ADD. In 1994, it was renamed ADHD and broken down into three subtypes, each with its own pattern of behaviors:

1. an inattentive type, with signs including:

• inability to pay attention to details or a tendency to make careless errors in schoolwork or other activities
• difficulty with sustained attention in tasks or play activities
• apparent listening problems
• difficulty following instructions
• problems with organization
• avoidance or dislike of tasks that require mental effort
• tendency to lose things like toys, notebooks, or homework
• distractibility
• forgetfulness in daily activities

2. a hyperactive-impulsive type, with signs including:

• fidgeting or squirming
• difficulty remaining seated
• excessive running or climbing
• difficulty playing quietly
• always seeming to be "on the go"
• excessive talking
• blurting out answers before hearing the full question
• difficulty waiting for a turn or in line
• problems with interrupting or intruding