Orthodoxy practices “Triple Initiation”—Baptism, Chrismation, and Holy Communion—administered consecutively, even for infants.
Holy Baptism is the doorway to the Church, where the individual dies to the old life of sin and is born into new life in Christ. The three-fold immersion in the name of the Father, Son, and Holy Spirit is a public identification with Christ’s death and resurrection.
Holy Chrismation follows baptism immediately. The newly baptized is anointed with holy oil (chrism) to receive the “seal of the gifts of the Holy Spirit,” marking them as a full member of the Church blessed with specific spiritual talents for the glory of God.
The Holy Eucharist concludes the initiation. Even as infants, the newly enlightened are brought to the chalice to receive the “medicine of immortality,” emphasizing that children are full members of the Church from their earliest days.