Okay kiddo, tapioca balls are little chewy balls that you might find in a bubble tea or boba drink. They are also called boba or pearls. They are made from a plant called cassava root.
To make the balls, the cassava root is ground up and turned into a starchy powder. This powder is then mixed with water to form a dough. The dough is then rolled into little balls and boiled until they become soft and chewy.
Tapioca balls don't taste like much on their own, but they are great at soaking up flavors from the drinks they are put in. They add a fun texture to the drink and can make it more filling too.
Just be careful when you are eating them! They are small and round, so they can be easy to swallow without chewing them first. Make sure you give them a good chew before you swallow!