Ideal for any off-road lovers, speed demons and LEGO fans up for a challenging build Fully assembled, the vehicle measures over 12cm high, 26cm long and 20cm wide Contains 772 pieces and features a new-for-October-2021 LEGO track element that gives the bulldozer its realistic movement The LEGO Technic universe opens up the world of engineering for LEGO fans ready for their next building challenge Kids can enjoy twice the fun with this LEGO Technic set. In a first for LEGO, this vehicle flips over when it drives into a wall to reveal the second vehicle. No wall? No problem! Kids can turn the model over to switch vehicles. On one side is an aerodynamic tracked racer. On the other side is a tracked exploration vehicle. With suspension, a cockpit and tracks on both vehicles, plus a truck bed on the exploration truck, there's lots for kids to discover. Take control with the app Kids will love using the CONTROL+ app to operate their vehicles. Using the app, they can steer the vehicle and complete fun challenges. The app experience changes for each vehicle and cleverly switches screens when the model flips. Explore engineering LEGO Technic buildable models feature realistic movement and mechanisms that let LEGO builders explore engineering concepts in an approachable and realistic way.