Ocarinas are adorable, sweet potato shaped instruments, played by blowing air into a mouth piece and adjusting the positioning of your fingers over different holes (almost exactly like a recorder).
The instrument itself is traditionally made from ceramic clay, though they are also made from plastic, wood, and metal. Instruments like the modern Ocarina have been found in ancient Chinese and Mesoamerican cultures. More recently, they have been popularized by the video game Zelda.