It makes me sad when I hear of someone being hurt by their children's remarks. First of all, it is your hobby and unless it is hurting you or someone else, it is really none of their business. You do not look like you are about to kick the bucket, so unless they are worried about what they will have to do with all your stuff when you are gone, it should not affect their lives in anyway-unless you felt good hearted and made them a quilt with that stash they want you to do away with.