A set of standards they will live by

Children are not born with a built in set of standards that they will live by. It is something they learn from those around them. If you want happy kids be happy when you are with them. They will do what is expected of them if you let them know what you expect. They will accept the boundaries you set if you set boundaries and let them know that you won't accept them being crossed. Kid's pick up their parents habits so teach them the habits that you want them to follow. Make time to spend with them guiding them when they are young to get them on the right path with a set of standards that they will live by.