An ossicone is like a horn that comes out of the head of some animals, kind of like if you had a unicorn horn but it wasn't just on your forehead. They're often found on giraffes, who have two ossicones that stick up from the top of their heads. Ossicones are made of bone and are covered in skin and fur, just like the rest of the animal's body. They're used for things like fighting with other animals, reaching high-up food, and attracting a mate. So basically, ossicones are like special horns that some animals have on their heads to help them survive and thrive in their environment!