Identity and logo of Slovak film by Iveta Grófová, based upon the book of Monika Kompaníková. Children's heroes creates their own world with own rules. The motif of the heroine and her hair thus creates the illusion of immersion in another world. Together with the blue colour she sinks into the sea depths with pink standing for childish naivety. The premiere of the film included a re-edition and redesign of the book, which thus follows on it visually. Posters, citylights, advertisements, various banners, postcards, photo walls, folding leaflets, business cards, packs, and DVDs were created. The soundtrack was also published separately in the book. The film has been screened in cinemas around the world and has won numerous movie awards.