I have a 1Yr. 2Month old niece and she just hates her car seat. The only way she will stay in it is if she's eating something or drinking her bottle. Otherwise she cries until she vomits (from anger), and does anything to get out of there!!! We don't know what to do so she can stay there. She is very active as any other 1 year old...she's barely starting too walk. But nothing brings her down even when she's sick. And if somebody tries to tell her not to do somethng she will bite or scratch. What can we do?