At times when they bite you, hit at you, throw stuff at you, tear your stuff etc they are simply playing, one of the ways to show how happy and excited they are.
Some months ago, my niece (a year old) hit the mom in the eye during the moms sleep. The mom screemed and woke up. She nearly cried. And she said: if an adult does that to me I will deal with him/her.
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I have a relative who used to bite. He was a very funny kid bitting everyone and at the same time enjoying our screams. (He was a hero, the biting scorpion)
So Jasoncran, when your kid does that she's simply playing. There is a big difference between her play and fight. Just watch her face during each, you'll know they difference.
Did you people do the (mother) baby -friendly thing?