Andoer 10" Ocean Wave Bead Drum Gentle Sea Sound Musical Toy Tool for Baby Kid Child Christmas A amount of small steel balls inside the drum delivers a fantastic sound effect when rolled over. It can create sound like waves crashing against rocks or waves slowly lapping at a beach. Made of lightweight wood and special plastic paper, smooth and exquisite. 10" diameter, 1.4" width. A funny toy for baby, and a good tool to attract their attention.