Pocoyo - Duck Stuck (S02E15)

Pocoyo finds a strange door. When he opens it, it seems to lead to the sky. He can hardly believe his eyes so he shows it excitedly to Pato. But this time the door opens up to reveal an underwater scene. Pato is so fascinated that he walks through this unusual door and gets stuck. Every time Pocoyo opens the door it seems to open up somewhere new. Pocoyo can’t track Pato down. Eventually Elly helps bring Pato back, and they all have a party to celebrate being together again.