Is it permissible for me to allow my children to watch children's channels that harm their beliefs and morals?

Parents must protect their children from the channels of the people of innovation and misguidance, because a child is a trust, and their pure heart is shaped by what is instilled in it. If they are raised on goodness, they will be happy in this world and the Hereafter. Furthermore, Allah has commanded us to protect ourselves and our families from the Fire, to discipline children, teach them good manners, and safeguard them from bad company. They must be taught the Qur'an and Sunnah, and kept away from everything that corrupts their morals. Neglecting to educate children leads to their corruption and their inability to benefit their parents. As for how to explain the reason for the prohibition to young children, it depends on the child's age and their ability to comprehend.