We have a 2 1/2 year old boy.  For 90% of the time, he is sweet and playful.  However, he hits and pushes others, both children and adults.  Also, he throws objects (an older brother's game pieces that the little one grabbed), and has injured several adults, one who got two broken front teeth and needed dental surgery, and just missed getting someone in the eye; he claimed he was playing catch although we explained that he should use a soft ball.  He has friends, playdates, goes to sleepovers, attends preschool for a few hours per week, is athletic, and is academically advanced: he speaks in full sentences, has a large vocabulary, knows all his letters and numbers, and even reads.  We make sure he is not hungry nor tired, we read to him and play games, make him feel loved, give him quiet play time, have a bedtime schedule, make sure he has physical activity, and we discipline him with words and reasoning, not hitting, with taking things away, and with time-outs.  His siblings are afraid of him, and so are some others, but not everyone; his friends do not care if he shoves and think it is fun, but the kids on the playground or indoor play areas do not like it when he shoves.  And we don't like it either.  What can we do with a child so young?  Help, please!