Getting travel insurance for your family is great because not only does it protect your loved ones, but it also offers a discount on the policy. But what comprises a family in terms of travel insurance? A couple with at least one child is considered a family. So, if you are a family with children, you can apply for family travel insurance and avail the discount.
It would help if you asked what the cut-off age for your children is. Some insurance providers deem children over a certain age not to apply for family travel insurance.
On a side note - you might not be able to get family insurance as a couple. Still, we would encourage getting individual travel insurance policies instead of one covering both. It might transpire that you might engage in different activities separate from each other on your travels. If one of you is more adventurous, then they won't be covered enough on a single policy, but if one of you isn't very sporty, you'll be paying too much for the risk of only one person. In the long term, buying individual travel insurance is much safer and cheaper.