A minor child is someone under the age of 21 or 18, depending on the state, who is not old enough to govern their own affairs. When planning their estate parents must consider their minor children and who will manage their financial affairs until they reach the age of consent. In addition to their own children, any relative or person who is a minor and is being considered as a beneficiary should also have someone named to handle the bequest. In this instance, the gift should most likely be put in a trust that can be accessed when the minor reaches the appropriate age. In addition to naming a financial guardian for minors, guardians should be named who will take care of the children's welfare.