Some online resources for the Science of Fireworks:

Steve Spangler Science: The Science Behind Fireworks - How Do They Produce the Brilliant Colors and Designs?

American Chemical Society: The Chemistry of Fireworks

Nova Online: Fireworks!

PBS LearningMedia: Igniting Chemistry in Fireworks

Popular Science: Everything You Need to Know About the Explosive Science of Fireworks

Journal of Chemical Education: Using the Chemisty of Fireworks to Engage Students on Learning Basic Chemical Principles: A Lesson in Eco-Friendly Pyrotechnics