Kodomo no Keijijougaku
English name: A Child's Metaphysics
Genres: Award Winning, Fantasy
Type: ONA, Episodes: 1
Aired: Oct 20, 2007
Source: Original
Rating: PG - Children
Synopsis:
A child whose head is numerals, a child who winds his own face and has it under his arm. What was left is his identity, a child whose eyes are provided by fishes, a child who lies down on the floor and head-butts his identity, a child who cannot say anything because of a zipper across his mouth. He undo the zipper but under it is another zipper...
Ecology and philosophy of  children with sadness and humour.

(Source: Yamamura Animation)