Are there any herbs that have stimulant effects, for treating a child with attention deficit disorder?

Probably, but why? Most of the herbal remedies touted for treating adhd have some type of stimulant such as caffeine as the major active ingredient. Studies are scant to nonexistent, and manufacturing of these products are not under fda scrutiny. Caffeine is a weak stimulant with a short half-life, so it may help but probably wll require multiple doses. Prescription products are much better studied and effective.