Is this for a high school psycho project? The question is much to vague to answer with any sort of short and meaningful response. Impulsive in what way? And misbehaves in what way (and according to whom and what standard)? In some environments frowning is misbehaving, in others it requires a handgun. The description of "sharing" is also severely vague. Who requested to share and how, when, what was being shared, what else was happening in the environment at the time, did the child have breakfast, was this the 1st day in day care, etc., etc. Sorry you'll have to be less casual if you want a targeted answer.