One of the simpler rockets and effective I've seen, and I've seen quite a few ;-) It works by burning some type of aerosol, a deodorant or similar spray, the more flammable the better.
I've put it on my to-do list. But while I decide to do it I leave you with the video. Very very simple. And as soon as we do ours, we hang it up with the improvements we make ;-)
If you look, they are 2 very simple parts. On the one hand it is from a PCV base, and a burner that generates sparks, for combustion and on the other hand the rocket formed with a plastic bottle and a mat The kind used for stretching in gyms.
It is mounted as the video indicates and to fly !!!