I've used these (and the X-13) kits from SureFire multiple times now as a Merit Badge Counselor for Space Exploration (and just ordered another 24!). White glue and a sharp blade (for cutting fins out of the balsa stock) are just about all you need once you print the instructions. The build instructions are easy enough for younger (age 11) kids to follow on their own or with very little supervision. During one Merit Badge Clinic, we built this and another kit in parallel in about an hour, interleaved with some instruction and discussion, and completed two flights for each Scout (16 total) in the remaining 2 hours, including all the multi-pad launch setup and tear-down. Unlike some other, more expensive ready-to-fly kits that fell apart or couldn't be flown again after their inaugural flight, these work well. The streamer option is great for windy areas or small fields. There is a parachute-based kit (SFR710187) available from HobbyLinc, but unless you know they'll be landing on tarmac or pavement repeatedly, the streamer option really is good enough for most use cases.

I ordered this for the parts, to have a collection of stuff on hand for when I want to build. For the price you get 12 each of 15 BT-50, 4 plastic nose cones, 3x6 3/32 balsa, complete BT20 motor mount, launch lug, plastic streamer (3 different colors), and elastic. BT quality is excellent, very small spiral groove compared to some that I have been working with. The parts are all interchangeable with standard Estes-sized parts. The BT20 in the motor mount is not glassine-wrapped and as such has a rougher surface than the BT50, but still should take a finish, should you choose to repurpose the parts. My only quibble is that the motor mount lacks a thrust block, so you can't built without the engine clip; but I have some, so it's not a problem. And yes, you are limited by the 12 identical nose cones, but I'll build with a few and then see what I want to add to the collection. I couldn't find a better deal on this much stuff. This should keep me of the streets for a while.

I bought these for my Boy Scout Troop and I am really happy with the price and the quality of the kit. The boys are excited and can't wait to get started building. I like this kit because it encourages the boys to use their own creativity in decorating their rocket. I am sure no two will look alike. I have done rockets in the past with other Scouts, and they had a blast. These are all new kids and I am sure they will enjoy it too.