(conversation between Ravi and Raju ) Ravi : Are they Doctors? Raju : No, they are not Doctors. Ravi : Then, What they are doing with Stethoscope? Raju : ohh, They are science students and they are preparing Stethoscope. Ravi : Are they preparing their own Stethoscope? Raju : Yes, they are preparing their own Stethoscope with the Teacher guidance and now they are checking their own heart beat count. Ravi : Really, It's amazing. I would like to involve in such things. Can I join with them? Raju : Yes, you can join with them on each Friday with the unique experiments.😊