How can the estate of a deceased father be distributed among his children, some of whom are over 18 years old and others are orphans under 12 years old, to ensure that everyone's needs are met fairly, especially given the disparity in these needs?

The money left by the father is to be divided according to Islamic law. It is not permissible to take the money of minors to cover the expenses of adults, such as education, car rental, and the like. The solution is to separate each person's share and spend on them from their own private funds. However, sharing food and drink is permissible.