Okay, kiddo. So you know how sometimes we go to school, and then we take a break for summer vacation? Well, grown-ups can also take a break from work, and that's called a sabbatical.
When someone takes a sabbatical, it means they stop working for a few months or even a whole year to do something else. It's usually something they've always wanted to do or learn about. Like, maybe your dad wants to take a sabbatical to learn how to play guitar or travel to different countries.
People take sabbaticals for different reasons, like to rest from working too much, to do research on a project, or to learn new skills that can help them do better at their job when they come back to work. But don't worry, when they're done with their sabbatical, they usually come back to work and keep doing their job just like they used to.