The listings state the sparklers are made of metal and include a metal handle for holding.
They are presented for milestone birthday parties and anniversary celebrations as number-shaped sparklers to mark those events.
Reviews praise the sparklers for creating a sparkling, magical visual impact on cakes and describe the design as cute, fun, and attractive.
Wait for the spark to go out on its own or submerge the sparkler in water to extinguish it. The listings explicitly advise not to blow the sparkler out.
They should be taken outdoors, ignited with a lighter, and held by the metal handle or end while they sparkle.