I play favorites with my kids
Why do you play favorites with your kids?
I play favorites by giving more attention and affection to my youngest
You shouldn't play favorites. The other children will pick up on this and resent you for it.
I'm only doing that to make my youngest feel like the chosen king. I don't have anything else to say on this.
This is not the best way to raise your children. The children you are not favoring will grow to not like you or the youngest as much. It is best to spread the love as evenly as possible.