Okay kiddo, do you know what a kernel is? It's like the brain of your computer that controls everything that happens inside it.
So, a nanokernel is like a smaller and simpler version of a kernel that does only the most important and basic things. It's called "nano" because it's really tiny and only does a few things.
Think of it like this: Imagine you have a big box of legos. The kernel is like the person who builds a big, fancy castle with hundreds of pieces. But the nanokernel is like the person who only builds a small, simple house with just a few pieces.
The advantage of having a nanokernel is that it makes your computer run faster and more efficiently because it doesn't waste resources doing unnecessary things. It only does what it needs to do to keep your computer running smoothly.
So, that's what a nanokernel is, a small and simple version of a kernel that does only the most essential things to make your computer work well.