"We invited ourselves," Karyn said.
Zoe kept on staring at Sarah.
"What are you staring at?" Sarah asked.
"Nothing." She looked away.
"You can't invite yourselves. Only I can do that," Sarah said to Karyn.
"We came to crash your party, Sarah." Then she turned to Zoe. "Let's get to it." She began to turn around, when Zoe grabbed her arm.
"Wait, I have a better way." She opened her hand to show a small rock in the palm of her hand.
"What's that?" asked Karyn.
"It's a magic wishing rock."
"You can make wishes with it?" asked Sarah, who was getting interested.
"Yeah. And I'm thinking of making one right now." She closed her hand over the rock and said "I wish ..."