Neb. Rev. Stat. § 25-310: Neb. Rev. Stat. § 25-310

The appointment may be made upon the application of the infant, if he be of the age of fourteen years, and apply within twenty days after the return of the summons. If he be under the age of fourteen or neglect so to apply, the appointment may be made upon the application of any friend of the infant, or on that of plaintiff in the action.