Thunder Tube̫ requires no batteries-it's all in the wrist and palm of your hand. Produce a wide variety of sounds by shaking the tube with one hand and opening and closing the top of the tube with the palm of your other hand. You can make additional sounds by scraping or tapping the spring. 2"x 7" with a 16"L spring. Is it An approaching stormAliens communicatingA lionA Big BangThe ghost of uncle JoeNOTE: Design on tube may vary.