Sacred Citation & SourceThe Prophet ﷺ said: "Each of you is a shepherd and is responsible for his flock", and the man is responsible for his family (Bukhari 893, Muslim 1829). Children are a trust (amana) from Allah.
Sacred Citation & SourceKey principles: teach by example first; begin teaching prayer at seven and follow up at ten (Abu Dawud 495), with gentleness and encouragement; treat children fairly and do not favour one over another (Bukhari 2587, Muslim 1623); show affection openly, as the Prophet ﷺ did when he kissed his grandson (Bukhari 5997).
Sacred Citation & SourceAlso teach honesty, respect, hygiene, and the Qur'an, and listen to their questions. Protect them from harm, including from screens and bad company. Allah says: "O you who believe, protect yourselves and your families from a Fire" (66:6). Schools of law and scholars differ on some practical details; this lesson gives the common principles and flags differences without settling them. For your own situation, consult a qualified scholar.