Inquisitive kids will love learning how a helicopter works with this LEGO Technic Airbus H175 Rescue Helicopter (42145) toy set. The many great features let your child explore how the different parts work together and assemble into the legendary helicopter for search and rescue flights. This model of the Airbus H175 rescue helicopter is bursting with features - just like the original. The included engine brings the model to life with several moving functions. The main and tail rotors can be adjusted for slow and fast flights. The retractable landing gear, winch and spinning engine are also powered by the engine. Manually operated functions include the swashplate for blade adjustment, a cockpit door, sliding doors, and hinged front and rear cowlings. LEGO Technic building toys depict the movement and mechanics of models in a realistic and understandable way to introduce LEGO builders to the world of engineering. They make a great gift for kids interested in technology and engineering. LEGO Technic sets realistically represent the movements and mechanics of the models to introduce young LEGO builders to the world of engineering with toy vehicles.