noun
hyperactive child
Refers to a child who is hyperactive, often in a medical or educational context. Can be used informally.
多動児のための特別なクラスがあります。
There is a special class for hyperactive children.
ADHD is the clinical term for attention-deficit/hyperactivity disorder, while 多動児 is a more general term for a hyperactive child.
Compound of 多動 (hyperactivity) and 児 (child).