Project Three - Development

My next step for project three is to figure out how to add sound into my application for specific times during the run time of the application.
I am wanting to add a paper ripping sound when the objects come into contact with each other, and a popping sound when they collide with 'walls' of the application.
In terms of the interaction, the user is already able to click and drag to move the objects around the screen. I am also going to add a mousePressed function to that the application can start over, but am unsure of what other interaction I want to use, or could use.