Lego City is a popular theme within the Lego brand that focuses on urban life and everyday activities. It features a variety of sets that include buildings, vehicles, and minifigures, allowing children to create their own cityscapes. The theme encourages imaginative play and storytelling, as kids can build and interact with different scenarios. The sets in Lego City often include elements like police stations, firehouses, and construction sites. Each set is designed to be compatible with others, promoting creativity and expansion. This theme is suitable for children aged 4 and up, making it accessible for a wide range of young builders.