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What it is: At around 20 months (sometimes earlier, sometimes later), you notice your toddler shoving, hitting, and kicking (ouch!) when things aren't going his way. Why it happens: Your toddler's boorish behavior is totally normal at this stage of development. For starters, he's beginning to assert his independence. This is also the only way he knows how to deal with frustration.
June 8th, 2010