These rocket models does not need any assembly. They are ready to be launched right out from the box. Just add a rocket motor, a launch pad and a launch controller (not included).
RTF - Ready to Fly Standing just 32 cm tall, this fully assembled rocket is powered by unexpensive Mini Estes motor
Almost ready to fly (ARF) model rocket. Fly it with standard motors (Estes B, C and Klima D9), but if you add the BT-55 Booster you get a two stager which flies to incredble altitudes.