Kids enjoy twice the fun with this LEGO Technic App-Controlled Transformation Vehicle (42140), a 2 in 1 remote control flip car. In a first for LEGO Technic sets, this transforming remote control car toy flips over when it drives into a wall to reveal the second vehicle. No wall? No problem! Kids can turn the remote control flipping car over by hand to switch vehicles. It will reveal a brightly colored tracked racer on one side and an orange exploration truck on the other, with lots of features for kids to discover. Kids will love using the CONTROL+ app to operate their off road RC remote control toy car that flips. 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. LEGO Technic RC remote control cars feature realistic movement and mechanisms, making them a top gift idea for any LEGO builder interested in engineering. This 360° double-sided vehicle measures over 4.5 in. (12 cm) high, 10 in. (26 cm) long and 7.5 in. (20 cm) wide. Contains 772 pieces.