"Apollo Program."  http://kids.msfc.nasa.gov/Rockets/Apollo-11/Apollo.asp.

"EstesRockets and Supplies."  http://www.hobbytron.net/model-rockets.html?AID=10117481&PID=1376334.

"How a Firework Rocket Works."  http://adc.gsfc.nasa.gov/adc/education/space_ex/firework.html.

"How Rocket Engines Work."  http://science.howstuffworks.com/rocket.htm.

"Make Your Own Nose Cones." http://www.apogeerockets.com/make_nose_cones.asp