The Lionel Polar Express G Replacement Train Passenger & Observation Cars 7-11022 is a limited edition starter set that includes 16 items such as passenger cars and observation cars in black color. Made of plastic, these cars are designed for G gauge model railroads and feature light and sound functions for an enhanced Christmas-themed experience. With an analog control system, this set is suitable for ages 12-16 years and is a collectible item from the popular Polar Express franchise by Lionel.