There are countless combinations of builds when you buy a block set. This deluxe block universe features 3 main characters: 2 firefighters and their adorable but professional dog. Build a house and fire station and drive that firetruck to the house! Or create your own buildings and your own stories. Combine with other block sets for a burly block masterpiece (other block sets sold separately) . Comes with a siren to affix above the station that has both lights and sounds!