In The Egypt Game, when the Egyptians return after a long absence, what happens after their ceremony?

The long absence that this question mentions begins in chapter 8. The kids have been forced to stay inside because a little girl went missing and was later found dead. The kids are not allowed to go anywhere or do anything that isn't supervised, so their Egypt game goes on hold for a long time. The kids finally return to Egypt in chapter 11, and they decide that the gods are angry at them for having been gone for so long. The kids decide that they need to make a sacrifice. They settle on burning some of their hair and fingernail clippings. As the ceremony is finishing up, Toby and Ken climb the fence and immediately begin making fun of everybody. The boys threaten to tell on everybody, but Elizabeth stops that from happening. In return for their secrecy, she invites them to play the game with them.