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