Description: 【Acoustic Thunder Sounds】 This drum creates a noise effect that's similar to the sound of , as you the tube shape body or tap on the open end, the metal spring will into the body which projects a deep sound outward. 【Effect】The drum body is held in the hand with the drum face down and the wrist section is pressed hard to the sound. The strength and of shaking control the size of the thunder. Let the baby familiar with the sounds of nature, will not be afraid of the sound of thunder. 【Drum Shaker Percussion Instruments】Through the interactive game teaching method, children not music and more willing to learn music, while developing good character and good personality, so that children are more lively and cheerful, quick thinking. 【Synthetic Construction】The tube shape body is made of wooden material that responds with a deep and warm resonant tone while being highly durable. 【For Meditation and Sound Immersion】 Our Drums are made to create an immersive effect so you can easily enter a meditative space by clearing your mind These instruments are also perfect for sound baths. Specification: Material: Wooden  Size Chart: L Size: 15cmx15cm/5.91inchx5.91inch M Size: 9cmx25.5cm/3.54inchx10.04inch S Size: 8cmx22cm/3.15inchx8.66inch Package Includes: 1 Spring Drum Thunder Note: Please allow slightly errors due to manual measurement and different monitors.