An ocean drum is a musical instrument that looks like a really big round flat bowl with a see-through top. It's like a big tambourine but instead of metal jingles inside, it has things like small balls or beads that make a sound when you shake the drum.
When you use an ocean drum, you hold it flat against your chest and tilt it back and forth so the balls or beads inside roll around, kind of like how the waves in the ocean move back and forth. This makes the drum sound like the ocean! You might even hear other sounds like seagull calls, ocean waves crashing, or even the sound of whales singing.
The cool thing about an ocean drum is that you can also play it by tapping it like you would on a regular drum. When you tap it gently, it makes a quieter sound, but if you tap it harder, the sound will be louder.
Overall, an ocean drum is a fun and creative way to play music while also imagining yourself on the beach, listening to the sound of the ocean.