Teach them Krishna consciousness at early age.
When you will project your consciousness and senses to Krishna the you become joyful, free from bodily conceptions and pains.
This world is completely overwhelmed by materail problems. The only solution is Krishna Consciousness.
Sow the seed of Krishna Consciousness in children.
Our children are the gift given by mercy of the Lord, they are delicate. Take care of them with Love and Devotion, by giving them Krishna Consciousness.
Krishna consciousness is not a sectarian religious faith; it is a teaching process for understanding the Supreme Lord and our relationship with Him.
Srimad Bhagavatam 3.32.40