The LEGO Technic Airbus H175 Rescue Helicopter (42145) construction toy is an amazing set for inquisitive kids aged 11 and over who want to expand their knowledge of engineering. With motorized and manual functions, builders will discover how different parts come together to create an iconic search and rescue vehicle. Realistic details add to the excitement, including a spinning engine, slow and fast speed settings for the spin rotor and tail, retractable landing gear, hoist, and a swash plate to control the pitch of the rotor blades. This set also includes sliding passenger doors, opening front and rear cowlings, and a cockpit door. The set measures over 9.5 in. (24 cm) high, 28 in. (72 cm) long and 5 in. (13 cm) wide, and contains 2,001 pieces. This educational building set is a great gift for curious kids who want to explore the universe of engineering in an approachable and realistic way.