Life is in phases, as a parent, you have work to do in the life of your children now they are still young. In the next stage of their lives, there are limits to what you can do to control them, it is advisable you teach them everything as they grow.
1) Teach them how to be committed and focused no matter the challenge facing them.
2) Teach them how to read the Bible or the Qur'an on their own.
3) Teach them how to be independent and self-reliant.
4) Teach them how to respect people, even their junior ones. Let them know that respect is reciprocal.
5) Teach them how to be truthful no matter the challenge facing them. Even the Bible says it, only the truth shall set you free.
6) Teach them how to pray. Whether Christian or Muslim, your child Relationship with God is very much important. Let them grow up in a Relationship with God.
7) Teach them how to avoid being involved in a romantic relationship before 20 years. The reason is simply because by 20 years the person will be able to take a good decision about his or her life including who to marry.
8) Teach them how to practice entrepreneurship. Billionaires are not made through salary. You can't make millions just by earning salaries but you can be a billionaire through entrepreneurship. No matter the child's educational qualification, he or she should have a business or skills.
Give them these foundations when they are controllable if you want to enjoy them in your old age.