If you're expecting your kids to go to college or trade school and you plan to help them fund it, this is another reason to boost your coverage.
You might expect to have 18 years to save for college, but if you only live for the first 8 years, your family is missing out on ten years when they would have been able to save.
Additional Time Off
If you have enough life insurance in place to cover your family's living expenses for a period of time, you might give your spouse the opportunity to take time off to grieve. While that's true in any marriage, it's even more important if you have kids.
Kids may need extra time to come to terms with what has happened. Perhaps your spouse chooses to move near family and needs extra time to get the kids settled. Either way, additional insurance coverage will give them those options.