Information can be found in the brochure My child is disabled - these aids are available http://bvkm.de/wp-content/uploads/2016_Mein-Kind-ist-behindert-diese-Hilfen-gibt-es.pdf
Children and adolescents who are physically or mentally handicapped or who are threatened with such disability may receive benefits from the integration assistance. (https://www.kvjs.de/soziales/menschen-mit-behinderung/eingliederungshilfe/#c14621)
You get information at the office for social services in Bremen: https://www.amtfuersozialedienste.bremen.de/kinder_jugendliche-1469
or at the office for youth, family and women in Bremerhaven: https://www.bremerhaven.de/de/verwaltung-politik/buergerservice/adressen-Offnungszeiten/amt-fuer-jugend-familie-und-frauen.22500.html