Do you mean:
* A model airplane kit? Many model airplanes are designed to fly, but you need to assemble and power them first.
* A drone kit? These kits often come with all the parts you need to build your own drone, which can definitely fly.
* A kite kit? Kites are meant to fly, but you'll need wind to get them airborne.
* A "kit" of some kind? If you have a specific kit in mind, tell me about it!
Once I know what kind of "kit" you're talking about, I can tell you if it can fly!