Wave Drum Ring is made of wood material, with a smooth and nice texture, not easy to break and hard to deform, and filled with many small steel beads, shake the steel beads to create the ocean sound and brings the scene of sea to kids. Wave Sound Effect: The wave bead drum with the metal beads inside create the sound effect of the ocean when the drum tilts and shakes, allowing you to enjoy the pleasant sounds of the sea, and giving you a feeling of being at sea. Wide Range of Applications: The sea sound drum suitable for musical classroom, concerts, weddings, family gathering, camping, picnics, birthday parties, give you and your friends a feeling of being at sea. : These are easy to use, just tilt the drum horizontally to create the sound of waves, and beat the drum to rough waves, which is a nice gift for children, parents, students, teachers for Christmas, birthday, baby shower, and much more! What You Receive: The package comes with 4 pieces of Sea Drum in 4 different sizes, respectively are 6 inches, 8 inches, 10 inches and 12 inches in diameter, the quantity can meet your daily family or school usages. Color: As Shown Material: Plastic+Wood+Metal Package Contents: 4 * Wave Bead Ocean Drum Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.