The present disclosure describes, among other things, a method that may include receiving, at one or more sensors in communication with a mobile computing device positioned within a device receptacle portion of a device, the device receptacle portion being configured to substantially enclose and protect the mobile computing device during physical activity, sensor data. The method may include determining, by a processor of the mobile computing device, motion data regarding a movement of the protective device. The method may include estimating a behavior of a user based in part upon the motion data. The method may include generating a response to the behavior including at least one of graphic, audio, tactile, or video output. The method may include providing, through a wireless communications path, the response to a second device in wireless communication with the mobile computing device.