Kol Hanearim:[1]

It is a worldly custom that on Simchas Torah all the male children receive an Aliyah to the Torah.[2] This Aliyah is customarily known as Kol Hanearim.[3] It is customary to spread a Tallis over the heads of the children during this Aliyah.[4] It is likewise customary to recite the verse of Hamalach Hagoel after the conclusion of the reading.[5] Practically, the Chabad custom is not to spread a Tallis over the heads of the children during the Aliyah of Kol Hanearim. Likewise, it is not customary to read the verses of Hamalach Hagoel.[6]

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[1] Rama 669/1; Sichas Leil Simchas Torah 5715, printed in Toras Menachem 13/55; Otzer Minhagei Chabad p. 380

[2] Rama ibid

[3] This follows the wording of the Rama ibid

[4] Rebbe ibid

[5] Rama ibid; Rebbe ibid

[6] Rebbe ibid in name of the Rebbe Rayatz

The reason: As the day of Simchas Torah is higher than this concept of spreading a Tallis and saying these verses. [Rebbe ibid]