Modular toys are playthings designed with interchangeable parts that can be combined in various ways to create different structures or forms. These toys encourage creativity and problem-solving skills, allowing children to build anything from simple shapes to complex designs. Examples include building blocks, magnetic tiles, and snap-together pieces. These toys often come in sets that can be expanded, providing endless possibilities for play. They are popular among educators and parents for their ability to promote fine motor skills and spatial awareness. Brands like LEGO and Magna-Tiles are well-known for their modular toy offerings.