Twice the fun awaits kids aged 9+ with the LEGO Technic App-Controlled Transformation Vehicle (42140). This 2-in-1 remote control flip car is a first for LEGO Technic sets, with the vehicle flipping over when it hits a wall or when switched by hand. Kids can choose between an aerodynamic tracked racer and an orange exploration truck with ample compartments to explore. With suspension, cockpit, and tracks on both vehicles, this app-controlled toy offers a challenging yet rewarding building experience. Kids will love using the CONTROL+ app to operate their RC remote control toy car, steering and completing fun challenges. An excellent introduction to engineering, this set boasts 772 pieces and measures over 4.5 in. (12 cm) high, 10 in. (26 cm) long, and 7.5 in. (20 cm) wide.