All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
It is confirmed in the authentic Sunnah that the Prophet urged Muslims not to let children go out at the first part of the night (i.e. sunset) in order to protect them from Satan. The Prophet said: "When the first part of the night comes, prevent your children (from going out) as the devils spread at that time and when the first hour of the night is over, then allow them."
Allaah knows best.