In the previous week, from 9th to 13th of September, M1 students of the MLP Program were immersed in an experiment where they applied their prior knowledge regarding acid and alkali. In this experiment, facilitated by the subject teachers Master Nattapat and Ms. Vanessa, students tested the acidity or alkalinity of some household substances of their choice. A natural indicator, red cabbage, was used as the pH indicator in the experiment. The red cabbage was mixed with the different household solutions, and as a result their colors changed, signifying the group where it belongs (acid/alkali). As the colors transitioned, this made the students amazed and at the same time soundly classified and identified the approximate pH strengths of the various substances. In addition, the students have also realized that universal indicators are not isolated from the acid-base indicators commonly used in laboratories. Some natural pH indicators, like red cabbage as used in this experiment, can also be a reliable and safe sample source in identifying acidity and alkalinity of chemicals. Through this hands-on activity, the students developed awareness of some common chemicals we encounter every day, which are commercially posed as safe but could put risks into our lives when not handled properly. It may be simple, yet the understanding gained from the experiment could be of significant value in our daily lives. Furthermore, it is crucial for the students to be exposed to such pragmatic activities to develop their innate consciousness, curiosity, as well as critical thinking of the natural world. This will also let them help remind their family members of the danger some common chemicals may cause as well as take proper precautions when handling them for their safety. As the saying goes, “Don’t learn safety by accident”.