Children aged 9 and up can enjoy double the fun with the 42140 LEGO® Technic™ App-Controlled Transformation Vehicle set. For the first time in LEGO Technic sets, this vehicle flips over when it hits a wall to reveal a second vehicle. No wall? No problem! Kids can flip the model to switch vehicles. On one side is a sleek, tracked race car, and on the other is a tracked exploration vehicle. With suspension, a cockpit, and tracks on both vehicles, plus a cargo truck bed on the exploration truck, there’s lots for kids to discover. Control the vehicle via the app Kids will love using the CONTROL+ app to operate their vehicle. Using the app, they can steer the vehicle and complete fun challenges. The app experience changes for each vehicle, and the screens cleverly switch when the model flips. A great introduction to engineering LEGO Technic buildable models feature realistic movement and mechanics, making them a perfect gift for any LEGO builder interested in engineering. 2-in-1 fun – Build the first-ever flip-over vehicle in LEGO® Technic™ history with the LEGO Technic App-Controlled Transformation Vehicle set (42140), featuring a tracked race car and a tracked exploration vehicle. Watch the model flip! – The vehicle flips when it hits a wall, or it can be manually flipped to reveal the brightly coloured tracked race car on one side and the orange exploration truck on the other. CONTROL+ app – Kids can use the app to steer the vehicle, complete fun challenges, and view driver stats. The app automatically changes the screen to match the vehicle when it flips. Designed for ages 9+ – This app-controlled toy features suspension, a cockpit, and tracks on both vehicles, plus a cargo truck bed on the exploration truck for kids to explore as they play. Suspension system – Both vehicles have advanced suspension, allowing the tracks to adapt to uneven surfaces. Shock absorbers – 2 shock absorbers activate the "flip" function that changes the vehicle's shape when it flips. The set also includes 2 large motors and 1 axle. Dimensions: This 360° dual-facing vehicle measures over 4.5 in. (12 cm) high, 10 in. (26 cm) long and 7.5 in. (20 cm) wide. Learn through play: The world of LEGO® Technic™ sets offers advanced building toys for LEGO fans ready for their next building challenge. Condition: Very clean used Box and instruction catalog are available.