Éclosion (2006)

In an uncertain time and place, a group of animated shy rock cubes come out from the anonymity of their quarry to mate. Powerful and indescribable forces made them move towards others in the sky, in a sort of dance that attracts some cubes to others, until those compatible latch on each other and produce a fresh new rock cube.

Unfortunately the movie Éclosion is not yet available on Disney Plus.