3D movies are films that create the illusion of depth, making the images appear more lifelike. This effect is achieved by using special cameras or techniques that capture two slightly different angles of the same scene, mimicking how human eyes perceive depth. Viewers wear 3D glasses that filter the images, allowing each eye to see a different perspective, which enhances the visual experience. These films can be enjoyed in various genres, from animated features to action-packed blockbusters. Popular examples include Avatar and Toy Story 3. The technology has evolved over the years, with advancements in digital projection and virtual reality enhancing the overall experience for audiences.