We know, Rabotai (my masters), that things that have absolutely no use on Shabbat—things that have no use on Shabbat. Okay? For instance, let's say a rock. A person wants to pick up a rock. You have a rock in your backyard, and you want to pick it up and play with it. Okay? A twig: there's no use for it on Shabbat. However, there's one way you can use it on Shabbat. What is that? If before Shabbat you designate it, he said, “Listen, I'm going to use this on Shabbat. You know, I want to open my door open, so I'm going to take this rock and use it as a door stopper.” At that point, it becomes mutar (allowed to use it) because he designated it. There is a functionality to that item. Okay? The same thing with a twig. I use a twig. I'm using it to scratch my back; I'm using it, whatever it is. There, you have a function for the item, and then it becomes mutar to use on Shabbat.
So again, stam (ordinary) things—dirt, whatever. Those things are muktzeh machamat gufo (set aside due to its nature), and therefore you cannot use them. However, if before Shabbat you designated them for a certain use, then B'ezrat Hashem (with God's help), you are allowed to use them. B'ezrat Hashem, Shabbat, beracha vehatzlacha, shavua tov vekol tuv, rechavah.