Very simple Rocket to build, great for the novice. Another Retro kit from Semroc and a great flyer. You can add alot of Fun to this rocket when used with the booster that Semroc offers. The booster will lift it about 20 feet and the rocket will almost stop in the air when the primary takes over and blows the booster off to send the Rocket on it's way. Very cool with everything happening low and slow.