This looks like some caveman's attempt to make a ball by sewing together animal skins and inflating them. His underdeveloped brain and clumsy, stubby fingers prevented him from making a sphere, though: there are large, sloppy stitches on the top, and the whole thing's shaped like an oval that comes to a sharp point at the short ends.

Oddly enough, modern frat boys use similar objects when they want to throw a ball around. But is it a surprise that frat boys and cavemen think alike?