To promote and develop sensitivity of students towards the chemical nature of different substances that they eat, a science activity, "Natural Indicators(Acid/Base)” was organised for G-7 students. The activity aimed to identify the nature of substances as acidic or basic through natural indicators like litmus paper, turmeric, China rose, etc. Students observed the effects of different indicators on different substances. They used litmus paper, turmeric, red cabbage, china rose as an indicator and tested substances like lemon, soap, detergent, vinegar, etc and understood the acidic or basic nature of the substances. This activity gave a hand on experience to students and they explored the nature of many substances.