Explain a database in one sentence to your eight-year-old nephew

A database is like a well-organized school bag where you keep different items, like books, notebooks, ballpoints, and pens. When you need a pen, you open your geometry box, and since everything has its own place, you can easily find what you're looking for. Similarly, in a database, information is stored in different tables, and you retrieve what you need from the specific table where it’s kept.