I also made the fuel and the engine. All is made from the materials you can easily obtain or even have at your house right now.
They can go up to 300 meters (1,000 ft) on this fuel.
Making the fuel involves working with the ammonium nitrate, please before you do it, read this article - http://www.health.ny.gov/environmental/emergency/chemical_terrorism/ammonia_tech.htm
Especially the "What are the immediate health effects of ammonia exposure?" paragraph, so you realize the risks you are taking and I am not responsible for the consequences.
Step 1: Material for the fuel
What we will need:
1. Ammonium nitrate (how to get described in the next step)
2. Baking soda
6. Measuring cup
Step 2: How to get Ammonuim nitrate
So, the easiest way to get it is to buy a cold pack. Open it and remove water from it.
I am pretty sure you could also order it online, but for me the cold pack seems the easiest way.
Step 3: Mix
In this step it is important to keep the proportion. 1:1. The size of measuring cup may slightly vary, but its important to use the same one for adding everything. My cup was about 200 mL
Step 4: Mix
Use the same cup you used in step 3.
Mix everything together.