sorry, couldn't access that link—it seems offline. obonjan island's standard policy is adults-only (18+), with no family accommodations in glamping, lodges, or homes, even for events like zitadelle; the child ticket mention might be an error or event-specific exception, so contact organizers directly at info@obonjan.hr to clarify room add-ons for your 2 adults + 5yo. obonjan.hr festicket.com