My 13 month old daughter likes to hit, pinch, pull hair and bite. She is never angry when she does it; instead, she is super happy and cheerful while torturing us all. We do not have a TV and she does not witness us doing that to each other, so I don't know where she gets the idea it's funny. When she was very small I simply redirected her, but recently we have been looking at her with mad faces and calmly stating "NO. We use our teeth to eat food, not bite" or something along that vein.
Personally I feel that time out is wasted on a 13 month old as they can't understand the connection between biting and pinching and time out. I am opposed to the advice of biting or pinching back, and I won't entertain the thought of it.
When my son tried this, I only needed to look at him "mad" and say "NO a couple of times and he cut it out. But my daughter is getting worse as time passes. I'm afraid she won't be able to get along with peers if we join a toddler class. I need a new strategy to get her to stop before she gets to 18 months old, when she will be able to join a toddler class. They won't let her stay if she is aggressive.
Any other pieces of advice? I loved Mothering when it was a real magazine and I'm hoping the online community has more gentle attachment parenting-type solutions than what I'm getting elsewhere.