The Rebbe's guidance on supporting widows and orphans, and his words to orphaned children:
Helping widows and orphans. Supporting widows and orphans through acts of kindness strengthens their Jewish identity and brings great merit (IK 10223, 10252). Challenges in this communal work should inspire greater effort, not discouragement (IK 9700). Widows who have been through loss themselves can lead support efforts for others (IK 9414). Supporting orphans who are receiving Torah education brings eternal merit (IK 3571). On sending practical help such as siddurim and funds, see IK 10072.
Orphaned children. To bar mitzvah boys orphaned by war or terror, the Rebbe wrote that Torah study and mitzvos — especially tefillin — and living with joy bring them strength and protection (IK 9502, 9740, 9929, 10178, 10457, 10824). Their bar mitzvah marks spiritual responsibility, and trips and celebrations for them should be planned with family sensitivity (IK 9511). On bar mitzvah customs for an orphaned boy, see IK 6684; on tefillin for orphans, see IK 503.
See also: Tzedakah – Free loans, gemach and acts of kindness; Parenting – Bar and bas mitzvah.