Three of my grandsons take medication so they will sleep. The oldest was diagnosed with severe ADHD at 3. At 11 he is also bi-polar. He is a talented artist, and has trouble with language, math, and reading. He makes friends easily, though he is the size of the average third grader. He is addicted to scary movies, and has broken bones in both his brothers more than once. He is intrigued by fire. He sees a professional.
His 8 year old brother has no apparent problems other than sleep.
Their 6 year old brother has sleep problems, is slow in securing bladder control, reads appropriately for his age, gets frighteningly angry easily, is big muscle active, such as doing handsprings off the back of the couch, has poor table manners, sprawls out over chairs, flapping his arms and rolling his eyes. He seems unable to make friends, yet he has normal attachments to family. Both of his brothers adamantly say he has no self control He scratches himself deeply, knocks himself repeatedly in the head, and bites himself until it bleads. . He seems of normal intelligence, but I have yet to see any insight about anything.