Marquetry is like making a big puzzle with pieces of wood. Just like how you put puzzles together by fitting pieces of the same color or shape, marquetry is done by fitting pieces of wood of different types and colors together. People who make marquetry cut thin pieces of wood into shapes and then arrange them into a picture or design. They then glue the pieces onto a surface, like a picture frame or a piece of furniture. This technique has been used for centuries to make beautiful decorations on all kinds of furniture and objects. It's like using wood to make art!