As a part of the interview process after the phone interview with a designer, there is the design prompt, and this is the prompt I selected:
#2 Lost in the Crowd
During a crisis, many people turn immediately to their mobile devices for assistance and information. One such situation occurs when parents lose track of a young child at a crowded theme park. Assume an application about that park would be installed on devices of a large number of guests and workers. Design a feature of that application that could help quickly reunite parents with their children, without requiring their children to wear or carry a device.
Wireframe + Mockups: http://crgw11.axshare.com/