Free time activities for children and adolescents are offered by sports clubs, churches and youth organizations.
In many districts of Bremen there are youth leisure homes, where there are leisure activities for children and young people: http://www.bremer-jungenbuero.de/jungen/links.php
or http://jugendinfo.de/themen.php/951/freizis-jugendzentren.html
Leisure activities for young people with and without disabilities can be found at http://www.lebenshilfe-bremen.de/freizeitangebote-kinder-und-jugendliche.html
and http://www.martinsclub.de/freizeit/kinder-und-jugend/
Children and youth recreation: http://www.kinder-jugendfreizeit.de/