Nucleolus
Nucleolus explained in an easy to understand way:

Imagine trying to bake a cake, but you first need to gather all the ingredients from different places in your kitchen. The nucleolus is like your kitchen counter where you bring together ingredients to mix and prepare the batter that eventually becomes the cake, similar to how it gathers materials to produce ribosomes. Just as the counter centralizes ingredients to create something essential (the cake), the nucleolus centralizes the components needed to assemble ribosomes, which are crucial for protein synthesis in the cell.
Practice Version

Nucleolus: The organelle that produces ribosomes in eukaryotic cells, it is inside the nucleus. Nucleolus. The nucleolus is a part of the cell that makes tiny machines called ribosomes, which help build proteins.