Monosaccharide:This is the simplest form of carbohydrates. They are the building blocks for more complex carbohydrates, just like how a single Lego block can be used to build bigger structures.
Disaccharide: This is formed when two monosaccharides are joined together by a glycosidic bond, similar to two Lego blocks stuck together with glue.
Polysaccharide:These are complex carbohydrates made up of many monosaccharides linked together by glycosidic bonds, much like an entire structure built from many glued-together Lego blocks.