The Project: To develop a method of making model rocket motors that are competitive in reliability and performance to commercial motors, using materials and tools that can be found around the house, or purchased at minimal cost from an hardware store.
The only pieces that do not fit the "easy access" requirement are the potassium nitrate (KN, KNO3) and Bentonite clay, which might need to be ordered from a pyrotechnic supplier.
Model Rocket Motors, A photo-illustrated procedure:
1. Motor tubes - made from posterboard and Elmer's Glue
2. Nozzle Drill - posterboard, Elmer's, and a drill bit.
3. Nozzles - rammed Bentonite clay
4. Grains and Motor Assembly
5. Bates grains for tiny motors - lower thrust, but longer burn. Averages out about the same total thrust
Scratch-built airframes: detailed description, making attractive and functional airframes from materials you might already have.