Kids set off on outer space adventures with the LEGO Technic NASA Artemis Space Launch System Rocket (42221) building toy for boys and girls ages 9 years old and up. This STEM building set, developed in collaboration with NASA and ESA, lets young builders construct an authentic rocket model that demonstrates the 3-stage separation process. Builders can turn the hand crank to watch the solid rocket boosters separate from the core stage, which then detaches, followed by the upper stage with its engine module, Orion spacecraft and launch abort system. This educational rocket kit includes 4 astronaut nanofigures, blue flame details and an information panel for creating an eye-catching display. Kids can explore the space launch system that will launch the Orion spacecraft into lunar orbit while learning how rockets work. Makes a fun birthday present or holiday treat for kids who love space toys and STEM toys. LEGO Technic sets feature realistic movements and mechanisms that introduce young LEGO builders to the universe of engineering in an approachable and realistic way. The LEGO Builder app includes digital tools that let kids track progress, zoom in and rotate models using 3D instructions. Contains 632 pieces.