Hi I’m recently divorce, and I want to keep kosher ,However my ex. does not and when my kids visiting with him,he gives them what ever he want,and does not keep kosher. What can I do?

There is no simple answer to this question. I suggest you begin by establishing a kosher home that is full of love and joy, and refrain from fighting with your husband. If your kids are under bar/bat mitzvah, don't make a big issue. As they grow up try to get them to want to eat kosher, but don't try to remake your ex.