I really like and enjoy estes rocket, and I decided to make one myself.
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
At first lets make a fuel of our rocket.
What we will need:
1. Ammonium nitrate (how to get described in the next step)
2. Baking soda
6. Measuring cup