LEGO Technic Heavy Lift Helicopter 42052 Advanced Building Toy Build a Heavy Lift Helicopter with motorized functions, contra-rotating rotors and working winch! 2 vehicles in 1  Rebuilds into a Tandem Rotor Helicopter Includes LEGO Power Functions motor that adds movement and lights to your LEGO building toys LEGO Technic building toys are compatible with all LEGO construction sets for creative building Heavy Lift Helicopter measures over 8 inches high, 23 inches long, and 20 inches wide 1042 pieces  For boys and girls between the ages of 10 and 16 years old