LEGO Technic Bucket Wheel Excavator 42055 Construction Toy Build the highly detailed 2-in-1 model featuring an array of different motorized functions Includes LEGO Power Functions such as forward and reverse driving, rotating bucket wheel, moving conveyor belt and rotating superstructure The largest LEGO Technic set every made LEGO Technic building toys are compatible with all LEGO construction sets for creative building Bucket Wheel Excavator measures over 16 high, 28 long and 11 wide. Mobile Aggregate Processing Plant with boom retracted measures over 8 high, 34 long and 8 wide, and over 12 high with boom extended. Mine Truck measures over 3 high, 7 long and 3 wide 3929 pieces  For boys and girls between the ages of 12 and 16