My 6 year old son has ADHD, he's often a bit rambunctious, doesn't follow directions well, speaks out of turn, has a hard time being still, is extremely fidgety, is impulsive and therefore does random things he shouldn't be doing (i.e. throwing something across a room, ignoring directions all together). He is like this with me and from what I hear from teachers at school too. However, when he is around people he doesn't know or someone he is afraid of getting in trouble from like DH/stepdad or his grandfather, he can appear to be a lot calmer. He may not call out or run around as much.