Only light one effect at a time. Once lit, move away quickly and keep a safe distance. Only use fireworks outdoors and away from anything that can burn. To prevent injuries, never throw fireworks and never hold them in your hand. Leave the area in better condition then when you found it.
Duds can be dangerous.
Place them in a bucket of water to soak. If a device does not ignite, leave it alone for at least five minutes and approach it carefully. Fireworks can be very hot after they burn. Let them cool down before handling them. Place all fireworks in a bucket of water to soak.