A firework is any device that can be used or intends to produce a striking display such as light, noise, or smoke, or a combination of those, by the combustion of explosive or flammable composition.
The exceptions defined by the U.S. Department of Transportation do not classify the following items as common fireworks, and their use is allowed within the city of Leander:
- Snake, GlowWorms - Pressed pellet of pyrotechnic composition that produces a large, snakelike ash upon burning. The ash expands in length as the pellet burns. These devices may not contain mercuric thiocyanate.
- Smoke Device - Tube or sphere containing pyrotechnic composition that, upon ignition, produces white or colored smoke as the primary effect.
- Wire Sparkler - Wire coated with pyrotechnic composition that produces a shower of sparks upon ignition. These items may not contain magnesium and must not exceed 100g of composition per item. Devices containing any chlorate or perchlorate salts may not exceed 5g of composition per item.
- Trick Noisemaker - Item produces a small report intended to surprise the user. These devices include:
- Party Popper - (also known by other names such as "Champagne Party Poppers," and "Party Surprise Poppers,") Small plastic or paper item containing not more than 0.25mg of pyrotechnic composition that is friction-sensitive. A string protruding from the device is pulled to ignite it, expelling paper streams and producing a small report.
- Booby Trap - Small tube with string protruding from both ends, similar to a party popper in design. The ends of the string are pulled to ignite the friction-sensitive composition, producing a small report.
- Snapper - Small, paper-wrapped item containing a minute quantity of explosive composition coated on small bits of sand. When dropped, the device explodes, producing a small report.
- Trick Match - Kitchen or book match that has been coated with a small quantity of explosive or pyrotechnic composition. Upon ignition of the match, a small report or a shower of sparks is produced.
- Cigarette Load - Small wooden peg that has been coated with a small quantity of explosive or pyrotechnic composition. Upon ignition of the match, a small report or a shower of sparks is produced.
- Auto Burglar Alarm - A tube which contains pyrotechnic composition that produces a loud whistle and/or smoke when ignited. A small quantity of explosive, not exceeding 50 mg, also may be used to produce a small report. A squib is used to ignite the device.