Yes, during primary and secondary education some schools provide school buses (in particular for special education schools) between the children’s home and the school, these services are free but sometimes they have to be paid (this is the case for private schools). Also, children benefit from free until the age of or discounted fees on public transportation. For more information: http://www.enseignement.be/index.php/index.php?page=26914&navi=2837 and https://www.delijn.be/fr/vervoerbewijzen/