Build an icon of drag racing – Race car fans will love building and exploring this action-packed LEGO Technic Ford Mustang Shelby GT500 (42138) drag race car toy set Pull-back function – With 2 pull-back motors, controlling this cool car toy is easy. Just pull back and then release to send your car speeding along Epic AR (augmented reality) experience – Use the LEGO Technic AR app to put the car to the test on a virtual racetrack. Check out the challenges for more fun ways to play Ideal for any drag racing fan aged 9+ – This muscle car toy building set makes a top gift for anyone who loves race cars, drag racing or AR toys Perfect size for play – This cool car toy measures over 3 in. (8 cm) high, 10.5 in. (27 cm) long and 4.5 in. (12 cm) wide