These are the things I learned:
Share everything.
Play fair.
Don't hit people.
Put things back where you found them.
Clean up your own mess.
Don't take things that aren't yours.
Say you're sorry when you hurt somebody.
Live a balanced life - learn some and think some and draw and paint and sing and dance and play and work every day some.

"ALL I REALLY NEED TO KNOW I LEARNED IN KINDERGARTEN" by Robert Fulghum.