(i) Make sound(s) with things around you
This activity is to make sound with things around, as quick as possible. You should motivate them to come up with their own idea. For example students can make sound using cap of pen, by banging on the table, etc. 
 

(ii) Make sound(s) with things given to you

In this activity you should provide a few commonly available materials such as rubber bands, plastic straw, paper cup, pebbles, empty box, plastic bottles and bags, string/thread etc. These materials should be kept in the class or can be given in groups.

At the end, you should also present at least one design in the class showing blowing, hitting or placking. With the help of your design or students design try to demonstrate or introduce "vibration".
For example: Vibration in string while plucking, put some pieces of chalk on table and hit the table with duster or some other thing-pieces of chalk vibrate. Ask them to visualize vibrations in air.