Where in the World is Sarah McMillan?

Jon nodded and turned the car around. "First, tell me how you ended up like this!" The little girl grinned. "It's a long story and it's not really all that important. What *is* important is that you get the wishing stone back ... safely." She was right. It didn't really matter how his grandfather became a little girl. At least his grandfather was still alive, in some form. Jon needed to get the stone back. But where should he go? Presumably Sarah would be at school, but what if she wasn't? She had the stone now, so she could be *anywhere*.