Bullies Kids Parents Protect

I don't think there is a simple solution here. I commend you for trying to work with the parents, but since that has not helped, you have to try other authorities. You don't say what sort of living situation you have. If you live in a community of apartments or condos/townhouses, you can try to approach the landlord or association. They may have policies for conflict resolution. If your neighbor is renting, again approach the landlord. If you live in a house next to another house and both of you are home owners, then try calling the police to see what advice or solutions they offer you. Perhaps these children or their parents could be charged with terroristic threats or harassment. If all else fails, you can contact a lawyer and consider legal action. Or you can move. Its sad that some people have so little interest in working with their neighbors to solve problems, but it happens too often. I wish you and your children luck.