You must begin buy taking a mixture of 65% stump remover and 35% sugar. If you chose to add aluminum or baking powder you would add 60% stump killer, 5% aluminum or baking powder, and 35% sugar.
Next you will mix the mixture with a little water and put it in an old frying pan that you don't want anymore.
With your stove on low gradually heat this mixture for 30 minutes.
At this point the fuel should be the texture of mashed potatoes. You now have to prepare the casings by cementing the end cap to the tube.
Take your rocket fuel and fill the tube one inch from the top with fuel and let it begin to cool.
Once the fuel is thick and almost hard take a nail and push it directly down the center of the fuel grain to make a hole.
Now you will need another end cap. Drill a 1/4 inch hole in this and put a 1/4 inch bolt through the hole with the top of the bolt on the bottom.
Take your clay and fill the space around the bolt with it to form a strong nozzle.
Take out the bolt and glue the nozzle onto the tube.
Finally you can add a fuze or an electric ignitor and have some fun.