In Science we have been looking at how sound is made and stopped. We hit the drum to make vibrations. When we put our hand on the drum the vibration stopped and so did the drum. The harder we hit the drum the bigger the vibration and therefore sound. To make a quiet sound we taped the drum gently.
When we held the triangle by the metal we did not get a good sound because the triangle could not vibrate properly. When we held it by the string the sound was much clearer.