KKKK is a community-based project dedicated to ensuring the holistic development for the protection of children. XSF served as the legal identity for the KKKK project, wherein three members of the XSF trustees sit in the 4K Governing Board established to oversee the general direction of project operations. Started in 2002 as a project of SEARSOLIN with 200 children in Midkiwan, Brgy. Bayanga.
Supported by Taiwan Fund for Children and Families, KKKK expanded its operation to 4 more barangays: Dansolihon, Mambuaya, Pagatpat/San Simon and Upper Carmen/Puntod.