How do I teach kindergarten kids about manners

a nice way to do that is to:

a.give them bait (like some polite points)
b.be slightly stern, but dont use a very angry face (kindergateners get scared easy and become nervous)
c.teach them simple things and make it seem like somthing hard so they feel better than every1 else ( they think there all that, but atleast they do somthing with it)

Play games about manners. You can also read books about them with pictures. You also can play guessing games and give treats so they become to look forward to the questions and games. Hope i helped you! have a great day! :) :) :) :) :)