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?

Yes they definitely do! I had been teaching my daughter to clap for weeks and she finally did it when she saw a kid do it at the park. My sister's toddler gets a lot of negative behaviour from her playdates. Make sure to take to your daughter after the playdate to explain what was good and bad behaviour. Since it's natural for them to mimic other kids (and even adults!), it's good to give your kids a heads up instead of just getting mad when the behaviour is suddenly copied a few days later.