Paroru's Future Island(2014)

Parol no Mirai Shima

There is a tiny island floating on the other side of a distant sea. Strange animals, still unknown to humans, live there. One of the island's children, Paroru, comes across a photo of the human world one day, and fascinated by this beautiful wonder, breaks the rules and rushes out of the island. Paroru and others are surprised and excited to see the human world for the first time. However, unforeseen pitfalls await them there…. Can they safely reach their journey's destination?

(Source: Anime News Network)

One of the four 2014 Anime Mirai (Young Animator Training Project) films funded by the Japanese government's Agency of Cultural Affairs in order to support training animators.