As others have said- children are children and they would follow an adult to buy an x box even if they knew it was wrong, but not because they are bad but because they have no sense of personal responsibility. They are children just like we all were once.
You gave birth to them. They are innocents. Please seek help. You are obviously not thinking straight. I appeal to the mother in you to remove yourself from this situation before you do harm. It is your responsibility to your children.