My 3 year old will be 4 in January and she has gone from the world's sweetest little girl to spitting, tantrums, and doing whatever she wants despite what you tell her! Tell me it is a phase that 3 year olds go through please? She's my first child. I remember my brother who is going on 12 when he was 3 and he threw tantrums but I don't remember if it was as bad or not. She also started daycare/preschool not that long ago in August so I don't know if it is the other kids rubbing off on her or what. I discipline her when she does this stuff but it's slowly been getting worse. It's really frustrating because I know that she understands that she is not allowed to act this way.