Dr. Kenneth Wong, with the assistance from Dr Anthony Tam, organized a STEM workshop at HKU on December 10, 2018 for 20+ students from La Salle College on building a 3D-printed battle tank with infrared battling system, and learning how to program an Arduino board to control the tank using a mobile-app connected via Bluetooth. Participants found the workshop very enjoyable and enhancing their interest in Computer Science.