This 6+ LEGO City Arctic Explorer Truck and Mobile Lab (60378) toy building set is packed with realistic features for imaginative play, including a tracked exploration vehicle with a working crane and a snowplow, plus a mobile laboratory, Arctic landscape setting, meteorite, 4 minifigures and 3 baby polar bear figures. Makes a great toy gift for 6 year old boys and girls. Give an easy and intuitive building adventure with the LEGO Builder app. Here they can explore and save virtual playsets, track their own building progress, zoom in and rotate and view models from all angles while they build. LEGO City sets put kids at the heart of the action with cool vehicles, realistic structures and fun characters that inspire imaginative role play based on real-life events. Combine sets from the LEGO City range for an open-ended world of play possibilities. Contains 489 pieces.