Do kids pick up habits from other kids? My daughter has a regular play date with 2 boys in my condo and they are always pushing and biting, and throwing tantrums. Will my daughter pick this up, or is she more likely to behave based on how she's brought up at home?

I agree with Ruoshan to a certain extent. It depends on how much time your kids spend with the other kids. If they play together every single day, they are likely to pick up their good and bad habits. What you can do to help the situation is being very clear that pushing and biting isn't acceptable at home. If the behaviour gets worse, it might be a good thing to consider talking to the boys' parents about it.