Bullying is an act of oppression that is carried out intentionally and repeatedly with the aim of hurting another person. Bullying can occur physically, verbally, or in subtle ways such as forcing or manipulating. Bullying can have a negative impact on victims, perpetrators and witnesses. Victims can experience psychological stress, behavioral changes and trauma. There are several reasons why someone does bullying, namely because they see their parents often fighting. Unhealthy parenting patterns, too liberated, too harsh, or lacking love and attention. This community service activity aims to provide education regarding the negative impacts of bullying and maintain the mental health of children in Mojowono village, Kemlagi subdistrict, Mojokerto regency. The target of this community service activity is 111 elementary school children from grades 1 to 6 using the hybrid learning method. The results of the evaluation of children's understanding of the material showed that 85% of children really understood the material presented