Lego 41090 Friends is a creative building set that allows users to construct a detailed model of a house with multiple rooms and accessories. The set includes a variety of bricks in different colors and shapes, as well as special pieces such as windows, doors, and furniture. Users can assemble the house according to the included instructions or use their imagination to create their own unique designs. The set is also compatible with other Lego building sets, allowing users to expand their creations and build even more elaborate structures.