Shoogle is a novel interface for sensing data within a mobile device, such as presence and properties of text messages or remaining resources. It is based around active exploration: devices are shaken, revealing the contents rattling around "inside". Vibrotactile display and realistic impact sonification create a compelling system. Inertial sensing is used for completely eyes-free, singlehanded interaction. Prototypes run on both PDA's and on standard mobile phones with a wireless sensor pack. Keywords Audio, vibrotactile, accelerometer, multimodal, mobile ACM Classification Keywords H.5.2 User Interfaces: Haptic I/O; H.5.2 User Interfaces: Interaction Styles; H.5.2 User Interfaces: Auditory (nonspeech) feedback