If you're a parent (or a grandparent), you're a theologian. You may not realize it, but you are. When your child (or grandchild) asks you questions like, "Who made that bug?" or "Who made God?" or "Where is God?" or "Why can't we see God?" or "Where do people go when they die?", you are dealing with theology. Your answers to those kinds of questions are always theological answers. In that moment, you are a theologian; and your child is looking to you as a theologian.
So the question for us parents is not, "Are we theologians?" but "What kind of theologians will we be - good or bad?" What kind of theology will we teach our children - good or bad? You see, we parents are all theologians, but it matters greatly (to us and to our children) what kind of theologians we prove to be.
Christian parents, be good theologians! Know God. Know His Word. Read good theological books. And don't shy away from your role as a theologian in the life of your child.