A flashlight can be used in so many visual tracking activities. Shine the light on words or letters taped to walls. Play "I Spy" in a dark room, shine shapes like this flashlight can for visual tracking and form tracking.
Basic Principles of Cognitive Behavioral Therapy is used for drug addiction and alcoholism. It's very helpful treating dual-diagnosis which is a combination of addiction and a mental illness. Depression is often seen with addiction as example.