Book excerpt: When worrying takes over, a boy uses mindfulness to calm down, just like Grandpa taught him. Every fall a boy hikes up the mountain with his grandpa and parents. Except this year he and his parents moved to a new place, and Grandpa's back home. As the boy sets out on a new mountain trail with his parents, he begins to worry about everything that's different. But he remembers that when Grandpa needs to calm his worries, he uses mindfulness. So the boy does too.