Hey there kiddo! Have you ever seen tracing paper before? It's a funny kind of paper that you use when you want to make copies of a drawing or picture.
So let's say you have a picture of a flower that you really like, and you want to make a bunch of copies of it. You could put the picture under a sheet of tracing paper, and then trace the flower onto the tracing paper with a pencil. The tracing paper is see-through, so you can see the picture underneath and trace it exactly.
Once you're done tracing, you can take the tracing paper off and you'll have a copy of the flower that you can color in or do whatever you want with. Cool, right?
The interesting thing is that tracing paper is actually very thin and delicate. It's made from a special kind of paper that's been treated with chemicals to make it very transparent. That means that you can see through it very clearly, even though it's still a paper.
So that's tracing paper in a nutshell, kiddo. It's a really handy tool for artists or anyone who needs to make copies of a picture or drawing.