Features: High quality materials: Made of coconut shell, environment friendly, durable and free from deformation and corrosion.  Wonderful sound: With the box design, the resonance is strong and the sound is more full, melodious and lasting.  Tuning rules: With 7 keys of metal tines, the longer the key, the lower the tone. The shorter the keys, the higher the sound.  Wide applications: The best choice for performance, recording, family, outdoor, school, party, and relaxation and so on.  Easy to learn: Comes with colorful appearance and exquisite workmanship, attractive for beginners and kids to learn fast.   Specifications: Keys: 7 keys;  Material: Coconut Shell & Metal;  Item Size: 16 * 16 * 10cm / 6.2 * 6.2 * 3.9in;  Item Weight: 170g / 5.9oz;  Package Size: 17 * 17 * 11cm / 6.6 * 6.6 * 4.3in;  Package Weight: 200g / 7oz;   Note: The color of thumb piano is randomly delivered.   Package List: 1 * Thumb Piano