LEGO Technic Planet Earth and Moon in Orbit (42179) is an interactive 526-piece building set for kids aged 10+ that recreates our solar system with a crank-operated mechanism showing Earth and Moon orbiting the Sun. Turn the handle to demonstrate realistic orbital motion, Earth's rotation, Moon phases, and seasonal changes via printed details on the rings. The sturdy model measures 9 in. (24 cm) high, 12.5 in. (33 cm) long, and 7 in. (18 cm) wide, serving as impressive space décor for bedrooms.
The intuitive LEGO Builder app provides 3D viewing, zooming, progress tracking, and saving options to guide independent building. Gear systems deliver accurate ratios—a 365.5-day Earth year and 27-day lunar cycle—making it an educational STEM toy that sparks astronomy interest and engineering skills. Perfect as a birthday gift for space enthusiasts, it encourages imaginative, hands-on play beyond assembly.
