Ta-da! The fire department is here—and it’s definitely an essential part of any child’s room. With these four awesome models, kids can perform heroic deeds and save entire cities right from their own bedrooms. The building set includes an adapter for a standard PET bottle, which is built into the model and used as a water tank. This helps children learn the importance of sustainability and that everyday objects can be used in all sorts of different ways—even in a fun way. An air pump is used to create pressure inside the water-filled PET bottle. When the valve is opened, water sprays out of the connected fire hose in up to three jets. This helps children learn about the relationship between air and water pressure in a playful way. Together with the included figurine, fischertechNik, children experience many exciting adventures: they carry out heroic missions, put out fires, and rescue people.