Firecracker is a type of explosive device that is commonly used for celebratory purposes. It is composed of a paper or plastic casing filled with an explosive material such as gunpowder. The term 'firecracker' can also refer to similar devices such as petards, squibs, livewires, and cherrybombs. A petard is a small explosive device that is typically used to breach walls or doors. A SQUIB is a small explosive device that is used to create sparks or smoke. A livewire is a type of firecracker that is designed to produce a loud noise when it is ignited. Finally, a cherrybomb is a type of firecracker that is designed to produce a large explosion.