Describe the things that the old man gave James?

In Chapter 3, James is crying in the corner of the garden when an Old Man appears from behind the bushes. This is a small Old Man who rests on his cane for support, and he calls James to come closer to him. When James moves towards the man, the old man reveals a small white paper bag filled with tiny green things that resemble crystals, each one about the size of a grain of rice. Soon James sees that the tiny green crystals are moving, and the Old Man tells James that these little items had "more power and magic...than the rest of the world put together." When James asks what the items are, the Old Man responds that they are "crocodile tongues boiled up in the skull of a dead witch for 20 days with the eyeballs of a lizard." After this brief yet confusing explanation, the Old Man gives the bag to James and tells James that the items are now his.