New guidelines for ADHD have expanded to include preschoolers and teenagers -- kids whose ages range from 4 to 18.

Harold Meyer, founder and executive director of A.D.D. Resource Center will be here to weigh in on these new guidelines, talk about how young children are assessed when it comes to ADHD, and the warning signs parents need to look out for.

For more information on the A.D.D. Resource Center, visit and