In a ‘Curious Incident,’ a special boy grapples with the twists, turns and illogic of growing up

Review: Christopher is determined to a) solve the mystery of who has killed his neighbor’s dog and b) take a math advance-placement exam. The story that takes flight is music for the soul. Now playing through Dec. 24 at the Oriental, this brave and wonderful Broadway in Chicago national touring production is about the dignity of the adolescent passage, as seen through the eyes of a brilliant boy in constant danger of sensory overload, and his ever-present companion, a pet rat. ★★★★