Hot Wheels Ai brings your favorite racing video game to life with authentic sounds, voices and hazards from Nintendo's Mario Kart game! Experience the most immersive Hot Wheels system ever and customize your Smart Car with premium Mario and Yoshi car body shells and wheel covers. Take it to the next level by inserting the customized cartridge into your Gaming Controller (sold separately) to unlock authentic Mario Kart sounds and reactions! Ai uses computer enhanced Artificial Intelligence to put you in total control of the racing action! Use the premium Mario and Yoshi car body shells and wheel covers to transform your vehicle and enter a whole new racing world! Includes one Smart Car body and 4 wheel covers. Each sold separately. Smart Car sold separately. Not for use with some Hot Wheels sets. Colors and decorations may vary. Ages 8 and over.