How can one answer a five-year-old child's questions about their genitals and their parents' relationship, what information is appropriate for this age in light of current openness, and are there reliable books that address children's sex education from an Islamic perspective?

The wise educator must listen to children's questions and answer them in a manner suitable for their understanding and age. It is preferable to answer them with what benefits and helps them, even if the question is not important, using a wise approach. It is important for the educator to correct any misinformation the children may have and not evade their critical questions to prevent them from resorting to inappropriate sources. As they approach puberty, they should be taught the rulings of purity, and girls should be taught the rulings of menstruation. As for the relationship between parents, it can be answered in general terms, while emphasizing the necessity of preventing children from seeing anything private between the spouses, and accustoming them to seeking permission, lowering their gaze, covering their 'awrah, and avoiding intermingling. Children should be taught daily supplications and Prophetic manners, and they should begin learning the Quran and prayer at the age of seven. It is essential to refine instincts and rectify behavior, and to occupy their time with beneficial activities such as memorizing the Quran and studying biographies, engaging in beneficial recreation, and sports, while keeping them away from bad places. There are useful books in this field such as "Raising Children in Islam" by Abdullah Nasih Ulwan, "The Prophetic Educational Methodology for the Child" by Muhammad Nour Suwaid, and "The Muslim Father's Responsibility: The Childhood Stage" by Adnan Hassan Baharith.