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It sound like he may be suffering from ADHD. Which can cause the low concentration levels and lack of self-control. I would suggest that you get him to see a child therapist who can do a full evaluation and begin to work with him and you on how to best manage his behavior. If necessary they can also refer him to a child psychiatrist for medication management if his behavior is unable to be controlled by therapy alone. Please let me know if I can assist anymore!