Real Christians believe that all was created out of nothing. LDS believe that matter is eternal, and god played with it like clay to make stufff.
“And as I prayed, the heavens were opened, and I saw the woman whom I had desired saluting me from the sky, and saying, ‘Hail, Hermas!’ And looking up to her, I said, ‘Lady, what are you doing here?’ And she answered me, ‘I have been taken up here to accuse you of your sins before the Lord.’ ‘Lady,’ said I, ‘are you to be the subject of my accusation?’ ‘No,’ said she, ‘but hear the words which I am going to speak to you. God, who dwells in the heavens, and made out of nothing the things that exist, and multiplied and increased them on account of his holy Church, is angry with you for having sinned against me.’” (The Shepherd 1:1:1 [A.D. 80]).
“Believe first of all that God is one, that he created all things and set them in order and brought out of nonexistence into existence everything that is, and that he contains all things while he himself is uncontained” (ibid., 2:1:1).
Aristides
“Let us proceed, then, O king, to the elements themselves, so that we may demonstrate concerning them that they are not gods, but corruptible and changeable things, produced out of the nonexistent by him that is truly God, who is incorruptible and unchangeable and invisible, but who sees all things and changes them and alters them as he wills” (Apology 4 [A.D. 140]).
Theophilus of Antioch
“Furthermore, inasmuch as God is uncreated, he is also unchangeable; so also, if matter were uncreated, it would be unchangeable and equal to God. That which is created is alterable and changeable, while that which is uncreated is unalterable and unchangeable. What great thing were it, if God made the world out of existing matter? Even a human artist, when he obtains material from someone, makes of it whatever he pleases. But the power of God is made evident in this, that he makes whatever he pleases out of what does not exist, and the giving of life and movement belongs to none other but to God alone” (To Autolycus 2:4 [A.D. 181]).
“And first, they [the prophets of God] taught us with one consent that God made all things out of nothing; for nothing was co-eternal with God: but he being his own place, and wanting nothing, and existing before the ages, willed to make man by whom he might be known; for him [man], therefore, he prepared the world. For he that is created is also needy; but he that is uncreated stands in need of nothing” (ibid., 2:10).