Sibling rivalry:
It is when two sibilings don't get along and they fight each other ery often.
Potty training:
It is when you try to teach your toddler to go to the bathroom
Thumb sucking:
When the toddler or baby has a problem of sucking the thumb
Whining
When the baby or toddler is alwas criying
Step-parenting
when a parent over rules the other or they don't support each other when is about parenting
Picky eating
When the child is very picky with his or her food.
Now, there are a lot of web sites that tells you advice for parenting. What I found out it is that there are more "trends" with this new parents. Like "my child doesn't need to share" or titles like that. that personally, it makes the kid more isolated than before.