This research aims to explore the way grandmother’s struggle hard in educating her grandchildren, who are entrusted to them by their biological parents. This research is a field research with a phenomenological approach. The research location was in the Puring, Kebumen, Central Java, with three grandmothers who are considered successful in raising and educating their biological grandchildren. The three grandmothers were taken into a sample based on appropriate criteria and were deemed to be successful in applying mental resilience education to their biological grandchildren. Grandchildren who are used as objects of research are also those who are considered successful in implementing mental resilience education imposed by their grandmothers. The findings of this study stated that from these three grandmothers in Puring Kebumen, all of them had concepts and actions that were appropriate and clear to be applied to their grandchildren. Some of the findings include the act of not spoiling grandchildren except in a natural way, obliging grandchildren to solve their problems without always being assisted by grandmothers, providing love and care for grandchildren appropriately, introducing grandchildren to the real struggle of life such as trading or selling, and also obliging grandchildren to live independently and fulfill their obligations.