Various professions have an increased rate of carpal tunnel syndrome (CTS) given the reliance on regular and repetitive movements of the hand and wrist. With the widespread use of computing devices, the popularity of video games, and the ubiquitous nature of mobile devices, the occurrence of CTS is increasing amongst the general public. Given the rise in CTS along with the corresponding implications including reduced workplace productivity and the reduction in the quality of life, there is significant interest in devising effective interventions to prevent CTS. Non-intrusive approaches include various hand stretching-based exercises that have shown to be effective. However, as with any exercise program, motivation to continue the program quickly decreases. Here we describe a hand motion tracking approach coupled with an engaging game-based 3D user interface (3DUI) to promote hand stretching exercises. The hand stretching exercises are tracked and feedback is provided to the user regarding the motions thus, ultimately helping the users to perform the exercise correctly. Preliminary results indicate that the system can be used to promote hand exercises in a fun, and engaging manner.