Hi, Jose!
Ka-chow! I love Cars! Your son will get the opportunity to meet Lightning McQueen and Mater at Luigi's garage in Hollywood Studios. Have your camera ready for some great photos.
While there are no Cars themed attractions in Walt Disney World (unfortunately, Cars Land is only in Disneyland in California) your son may enjoy some other Pixar fun like Toy Story Midway Mania in Hollywood Studios. Here, you will also be able to meet Toy Story pals Buzz and Woody. Also check the Meet and Greet times for meeting Mike and Sully from Monsters, Inc.
If you get a chance, you may also want to resort-hop to
Art of Animation where they have a Cars themed area in their resort. You can walk around to see the fun and even stop into the food court for a bite to eat. For a real treat, book a Family Suite at Art of Animation and select a Cars themed suite - super fun!
Wishing you and your darling 2 year old a magical vacation in Walt Disney World!