Give kids ages a thrilling project with this Lego Technic Mercedes-amg F1 W14 E Performance Pull-Back race car toy. This Mercedes car toy building set comes with authentic details inspired by the real car, plus a thrilling pull-back action to send the model racing as boys and girls imagine life as a champion driver. Want to enjoy quality building time with your young motorsport fan. You can join in the fun as you build your own advanced version with the Lego Technic Mercedes-amg F1 W14 E Performance 42171 set for adults sold separately. It makes a great companion to this set, letting kids and adults enjoy building at the same time. Lego Technic construction sets feature realistic details that introduce young Lego builders to engineering in an approachable way. Kids can enjoy an intuitive building adventure with the Lego Builder app, where they can zoom in and rotate models in 3D, save sets and track their progress. This pull-back car toy.