K.T.
G.,
I have experienced a Hyperactive child and one that is not although the ages were closer in age to each other. I recommend that you talk to your pediatrician to confirm the hyperactive disorder first. If he is indeed your dr. will be able to recommend what steps you need to take. Medication is often given to hyperactive children ADHD (Attention Deficit Hyperactive Disorder), (there is a difference between that and ADD. I fought a long time from putting my daughter on any medication because I seen my brother on retalin for all his life, but they put her on it and it made the BIGGEST difference. Night and Day. My daughter was so hyper she could not sit still to watch t.v. for 1 minute at that age. She would be standing up and then losing her attention and focus on the cartoon or whatever. I could not get her to sit and listen to any stories. Continuously running and could not stop. This was just some of the things that were signs.
It somewhat seems like he is a little bit defiant (another symptom of ADHD). Maybe he is doing this for attention because he wants his sisters attention and is upset she in not giving him her full attention when friends come over.
Just talk to your pedatrician and he can make the right diagnosis.
Good Luck,
Kathy