It's wrong not to give things back.
Lisa finds a dollar on the ground and sees a little girl looking for it.
Lisa wants to tell the little girl that she found her dollar.
Lisa walks up to the little girl, shows her the dollar and gives it back to her.
Lisa walks up to the little girl, shows her the dollar and tells her that finders are keepers before walking away.
The little girl is thrilled and starts to smile and laugh.
The little girl gets upset and starts to cry and whine.