Consider this interaction between a mom and five year old:
Mom: Why did you kick your brother?
Five year old: My friend Tommy was provoking me at school, and my frustration started to build into anger. I tried to repress it, but then when I got home, I transferred that anger to my brother by acting out physically.
If this scenario is foreign to you, you are not alone. You may be more familiar with your child responding by hitting, yelling or shutting down. Children do not have the language to process their experiences and emotions the way that adults do.