Get ready for a colossal LEGO® build and play experience with the 4,108-piece LEGO Technic Liebherr R 9800 Excavator. Developed in partnership with Liebherr, this replica model is operated via the intuitive LEGO TECHNIC CONTROL+ app and powered by 2 advanced Smart Hubs with 7 motors. The sophisticated app technology enables super-precise movement and amazing functionality, while delivering endless authentic digital play combinations via 4 different control screens with cool graphics. With the One-touch screen, users can use drag patterns to control the boom, arm and bucket, while the Custom-built movements screen enables them to choose pre-set commands or record the model's actions to create complex sequences of movements. And, with the Challenges & achievements screen, users can complete challenges to unlock reward badges. This groundbreaking LEGO excavator model features an amazing, true-to-life design and is finished with an authentic color scheme with sticker detailing. The model's complex gear mechanisms and technologies introduce LEGO builders to advanced elements of engineering while helping improve reaction times, cognitive thinking and creative problem-solving skills.