X8 Drums X8-THUNDER Thunder Drum Sound Effect Instrument Use this simple instrument and your imagination to make all sorts of special effects sounds When you manipulate the drum, vibrations in the attached wire spring travel freely through the drum head and are then amplified in the hollow tube As the drum head vibrates, air inside the drum also vibrates and begins to resonate, gradually increasing in volume until it reaches a thunderous crescendo before slowly fading away Slide a drum stick up and down the flexible wire spring, cup your hand over the open end while you play, or slap it for a nice striking sound The drum measures 10" long and is 3 1/2" in diameter and features a colorful, hand-painted storm cloud and lightning bolt