Things You'll Need
Instructions
Make a fuse by twisting sparklers together end-on-end. Make sure that the magnesium coating on each sparkler touches the coating on the next sparkler. You want the ends to overlap by less than 3 inches. A 10-inch sparkler takes approximately 30 seconds to burn, so two sparklers will give you a one-minute fuse, although you can make longer fuses. The sparklers on each end of the fuse should face in opposite directions, as the tips are more heavily coated and ignite more easily.
Put on your insulated gloves. Test your fuse by laying it on the ground with one end propped up on a rock or brick, then ignite it with a fireplace lighter. If the first sparkler successfully ignites the second, you know that you made the fuse correctly. Make and test a few more fuses to ensure that the sparklers will do their job.
Set the two ceramic flower pots in the middle of your fire pit, one inside of the other, and place your thermite inside. Ceramic is a very heat-resistant material and will contain the thermite reaction safely. Place one end of your sparkler-fuse on top of the thermite, and the other end on the ground.
Put on your insulated gloves again and have the fire extinguisher within reach. Ignite one end of the fuse. Although the thermite will not explode, and the flower pots will contain most of the sparks, you should retreat at least 15 feet before the thermite ignites.