Artificial intelligence (AI) is receiving a lot of attention in various fields. There is a need for educating students in AI technology. In this context, we have created a new type of carbon dioxide fountain by integrating AI with the well-established Arduino-carbon dioxide fountain experiment. This experiment consists of an Arduino microcontroller, pressure sensor, solenoid valve, and AI speech recognition and demonstrates the carbon dioxide fountain integrating AI speech recognition. In previous work describing the Arduino-carbon dioxide fountain experiment, the solenoid valve is opened automatically when the measured pressure value is less than a setting value. However, in this experiment, AI speech recognition is added to open (or close) the solenoid valve by the voice of the experimenter. In particular, this experiment introduces a scientific inquiry activity integrating AI technology that even beginners can easily apply.