In this video I show how to make a super simple propane bottle launcher, especially good for demonstrations of the basic physics of rocketry. I've used this launcher myself for kid's science lessons with great success. Thanks to my Patreon supporters for keeping these videos possible! https://www.patreon.com/NightHawkProjects A special thanks to my top supporters on Patreon! TheBackyardScientist, Enzo Breda Lee & Thibaud Peverelli