Kernrechtsfrage
Whether the child's appeal in federal court was admissible despite not having participated below.
Extrahierter Entscheid
The child lacked standing because he had not participated in the cantonal proceedings and no excusable reason for non-participation was shown.
Extrahierte Begründung
Party participation below is required under Art. 89(1)(a) BGG; the parents could have sought the child's participation earlier but did not.