Sparklers are a type of handheld firework that produce bright sparks and flames when lit. They are typically made of a metal wire or bamboo stick coated with a mixture of chemicals that burn slowly and emit sparks. Sparklers are commonly used for celebrations such as weddings, birthdays, and Independence Day, and come in a variety of colors, lengths, and burn times. While sparklers may seem harmless, they can be dangerous if not used properly and should always be handled with care.