I lead a 4h rocketry project in my project I have the kids build the super easy Alpha 3 rockets and then I'll have another meeting where kids build a little more advance rocket which basically is one where the fins are cut and glued on. This year most of kids are younger and might find this a bit difficult. What I am planning on doing is breaking up my meeting in to many small meetings so I can give personal attention to them. I really want the kids to make these rockets so they can paint and show them off at Science fairs that I attend and possibly the county fair if they like. Question Ive some rockets like Big Daddy come with precut slots in the body to hold the fins, this would be ideal for the kids but I really don't want them to build D engine rockets. are there any smaller rockets that have this same type of construction?