Dave Hax (previously) demonstrates how to make quick and easy mini-rockets just by emptying out simple tea bags, standing them on their side, and lighting them up.
Make a mini rocket, out of a tea bag, like indoor fireworks. Simple and fun project. As the teabag burns it creates a heat current which lifts the ash, almost like a hot air balloon. Looks great against a black background. Make sure you don’t do it around anything that can catch fire or burn.