Features a high-tech aerodynamic design, open cockpit with detailed seat, spinning main and tail rotors, controllable tail rudder, and a detailed engine with moving pistonsA uniquely decorated LEGO® Technic 40th Anniversary brick is included with this model2-in-1 model: rebuilds into an Experimental Aircraft- interactive, 3D digital LEGO® Building Instructions app available online for both A and B models, ask your parents’ permissionUltralight Helicopter measures over 4” (12cm) high, 9” (25cm) long and 7” (18cm) wideExperimental Aircraft measures over 3” (9cm) high, 7” (18cm) long and 7” (19cm) wideThis LEGO® Technic building set is designed to provide an immersive and rewarding building experienceThis vehicle set offers an age-appropriate build-and-play experience for ages 8-14