The kit contains the parts for the model, but you have to assemble them.
assitant
Alright, plastic kits can be bought online or in some hobby stores.
assistant
How can I build a model rocket
user
Did you mean “human: How can I build a model rocket ship”?
assistant
Yes
user
I think you’re looking for some kind of “plastic kit”, which is something you buy that’s already made.
assistant
tell me more about it
user