If this is a real threat, then please if you take nothing else to heart take this to heart. You kids are innocent in this whole thing, they don't suffer the demons that you suffer. If you are afraid of what will happen to them after you are gone, then the solution is not to end their life, which they cherish, it is to seek help so that you can be there for them, there really is life after depression, I know the pit seems deep but you can dig out.In the end, I believe the right to take ones life is a personal choice and you have to face whether life is so bad that it cannot be enjoyable, but you have no right to make that decision for your children, they love life and it would be taking something they cherish dearly away from them. If nothing else, seek help to clear your mind of the ideation of harming your children, because that is what it is, harming them, you will not be helping them by taking their life.