What causes are important to each member of your family? Your partner? Each child? What interests them?
If your child is still tiny and can’t articulate a cause, what do they like? Dogs? Food? Mommy? If your baby loves dogs, perhaps a cause you could associate with that interest would be a dog rescue. If they like food, a food pantry. If they are into mommy, a shelter or program that helps mothers.
Come up with a family list of what causes or ideas are important to your family (even if they don’t align with your own).