Kids roar around the race track with the LEGO Technic Porsche 911 GT3 R REXY AO Racing Car (42224), one of the most detailed LEGO Porsche building toys for boys and girls ages 11 years old and up. This STEM building set lets young car fans construct an authentic Porsche 911 endurance race car featuring a steering knob on top, working suspension on all 4 wheels, rear wheel drive with differential, 6-cylinder boxer engine with correct firing order, opening doors and trunk, and synchronized air jacks. Builders can steer the race car using the knob, test the suspension, explore the detailed boxer engine, and activate the air jacks for realistic pit stop action. This fierce Porsche race car features eye-catching T. rex-themed graphics that make it a showstopper on and off the imaginary track. Makes a fun birthday present or holiday treat for kids who love toy cars, dinosaurs, and kids toys like STEM toys. LEGO Technic sets feature realistic movements and mechanisms that introduce young LEGO builders to engineering in an approachable and realistic way. The LEGO Builder app includes digital tools that let kids track progress, zoom in and rotate models using 3D instructions. Contains 1,313 pieces.