Sensible advice ( unfortunately it’s harsh but a remedy)Sorry to hear what your son and you have been going through. Have these kids been bullying anyone else around? Are the parents of these kids generally difficult to other neighbours? If so, you might be able to group together with other neighbours and submit several reports to gardai and community gardai officer. There is strength in numbers. Also just encourage your son to protect himself when outside. He may have to do what he has to do to protect his mind and body. This way he will not feel as disempowered. I know that David Coleman (child psycholgist) encourages this especially for those kids who keep bullying another child. Role play is good too. Show your child some appropriate sportsmen protecting themsevles on the field/pitch when getting physically attacked in a game. You will notice they rarely walk away without protecting themselves first. However if there is a group of kids and he is on his own I would not let him outside and if possible consider moving house unless the bully's parents are reasonable and are open to a conversation.