A group of children find a magic stone that transports them to the XII century.
Unfortunately the movie El niño invisible is not yet available on HBO Max.
| Directing | Rafael Monleón | Director |
| Visual Effects | Gabe Ibáñez | Animation |
| Writing | Aurora Guerra | Writer |
| Writing | Manolo Matji | Story |
| Production | Federico Bermúdez de Castro | Producer |
| Production | Manolo Matji | Producer |
| Sound | José Carlos Parada | Original Music Composer |
| Sound | Bom Bom Chip | Music |
| Camera | Hans Burmann | Director of Photography |
| Art | Miguel Chicharro | Production Design |
| Editing | José Salcedo | Editor |
| Costume & Make-Up | Nereida Bonmatí | Costume Design |
| Directing | Héctor Carré | Assistant Director |
| Directing | Pilar Serrano | Script Supervisor |
