Welcome to the world of Sonix City where every day events are brought to life with sounds. Drive your vehicles around the playset and the special conductive material in the cars and on the circuit-embedded paper board will interact, blending the worlds of technology and play. Every move you make and stop you take will trigger different noises and voices. Each 3D playset comes with two unique vehicles and features more than 100 unique sound effects. The four different themes - Rescue, Raceway, Construction and Airport - can be used individually or can be combined to form one giant city.