It's really hot and dry, so we were very careful about this experiment.
We started with regular tea bags. Emptied the ones we were using and removed the staple.
We tried both with the bucket and without...it was just a slight bit windy. So the bag kept falling over.
The bag of course flamed pretty good.
Just as it got down to the end, it started flying up. Not the "rocket" the kids were expecting. But still a lot of fun.
How it works: “Everyone knows that hot air rises and this experiment demonstrates that idea as well as the principles of convection currents. As the tea bag burns, hot air is being created, as well as a thermal, or convection current, under the bag. When the tea bag burns down into a small enough ball of ashes, the convection current causes it shoot up in the air.”
[Quoted directly from Steve Spangler Science.]