Bubba and Squirt’s Big Dig to China

You can’t dig a hole to China! Squirt doesn’t believe Bubba can dig a hole to China. But when the hole swallows them, the kids find themselves in Xi’an, China, surrounded by Terracotta Warriors. It gets worse when the ghost of the first emperor of China appears. He tells them they can’t go home until they find his missing pi. Will Bubba and Squirt ever make it back home? (Appropriate for grades 1-6.)