Is it permissible for a woman to lead her immature male children in congregational prayer to teach them Salah, and how should they stand in this case, knowing that her daughter sometimes stands behind them? Is she sinful for doing so? And is it permissible for children to combine the Ishaa prayer with Maghrib or delay it until just before Fajr due to the lateness of the Ishaa time?

A woman is not permitted to lead a man or a boy in prayer, and the prayer of any man or boy led by her is not valid. However, a woman may lead her daughter in prayer, with the daughter standing to her right. If she leads more than one woman, it is preferable for her to stand in their middle.

The time for the 'Isha prayer extends, according to the majority of scholars, until the dawn. However, it is not advisable to intentionally delay it beyond one-third or half of the night, as that is a time of necessity. It is permissible for someone overcome by tiredness, fearing they might not wake up, to combine the 'Isha and Maghrib prayers by performing them earlier (jama' taqdim) and then sleep. If your children sleep before the 'Isha prayer time, wake them up during its time, even if it's before dawn, and their prayer will be considered performed on time (ada'). If they fear they might not wake up, combining 'Isha with Maghrib earlier (taqdim) is permissible according to some scholars.