Literally all paper. I took 2 sheets of construction paper, taped them together than using 4 mini engines taped together as a guide, I rolled the airframe. The engine mount is just the airframe itself with a pm engine block I made out of thinned out cardboard then rolled into a ring. The fins are from flaps of a cardboard box, I soaked them in super glue to reinforce them. Then I rolled the nose cone, put a small nail and more glue in the tip for weight, and just taped it on, tried separation with shock chord recovery but shock chord got stuck inside the airframe. So I'm going to give it an oversized engine hook to have the mini engine ejected into it to give it a tumble recovery. Didn't expect such a good flight from it.