Let kids aged 9+ build their own drag race car toy with this thrilling LEGO Technic Ford Mustang Shelby® GT500® (42138) model car set. The immersive experience with this model car kit to build gives kids a great introduction to engineering – but that’s just the start! Using the 2 pull-back motors, kids can send the pull-back toy car racing. What\'s more, they can use the LEGO AR+ app to take the play experience to the next level with a host of exciting, augmented reality features. Kids can have hours of fun putting their muscle car toy to the test using the LEGO Technic augmented reality app experience. Race your car, complete challenges and discover lots of fun ways to play. This drag racing car model also makes a great display piece – simply add the rear cover to complete the sleek looks.With vehicles that look and function like the real thing, LEGO Technic buildable models offer a fun introduction to engineering and mechanics for young LEGO builders and make wonderful, inspiring gifts for teens and kids - the engineers of tomorrow.Measures over 3 in. (8 cm) high, 10.5 in. (27 cm) long and 4.5 in. (12 cm) wide.Contains 544 pieces.