Overview

• Two tied helium balloons with a hand‑painted card drifted from Oberhausen to a third‑floor window at Hamburg Hauptbahnhof, where a Bundespolizei officer found them around 23:00.
• The sender is Mattis, 7, who launched the card during Karnevalsgesellschaft Venezia Oberhausen 2025’s first summerfest balloon competition.
• Police contacted the club via its stamp on the card and will mail the greeting back to the organizers in Oberhausen.
• The club says roughly 50 children took part and that Hamburg’s Bundespolizei is the only finder to report a discovery so far.
• The officers plan to send the boy a letter in response, and organizers will award prizes for the farthest‑traveled entries, with first place earning a spot in a children’s carnival procession.