Fireworks typically last anywhere from a few seconds to a few minutes, depending on the size and type of the fireworks. For example, a small firework may only last a few seconds, while a larger firework display can last up to 20 minutes or more. The duration of the fireworks display is determined by the design and arrangement of the fireworks, as well as the budget and preferences of the event organizers. **

Fireworks rockets are pyrotechnic devices that are propelled into the air and explode to produce colorful and dazzling visual effects. They are typically made of a cylindrical tube filled with explosive materials and a fuse at the base. When the fuse is ignited, the rocket is propelled into the sky and bursts into a display of bright lights, sparks, and loud noises. Fireworks rockets are commonly used in celebrations and events to create a spectacular and memorable experience for spectators. **

You can buy sparklers for fireworks at a variety of places, including party supply stores, fireworks stands, and some grocery stores. Additionally, you may be able to find sparklers at specialty fireworks stores or online retailers. It's important to check your local laws and regulations regarding the purchase and use of fireworks and sparklers before making a purchase. **

You can buy fireworks rockets at specialty fireworks stores, online retailers, or at certain seasonal pop-up shops that sell fireworks. It's important to check the laws and regulations in your area regarding the sale and use of fireworks, as they may be restricted or prohibited in some locations. Additionally, be sure to follow all safety guidelines and precautions when purchasing and using fireworks rockets. **

Some New Year's Eve rockets and fountains whistle because of the way they are designed. The whistling sound is created by the rocket or fountain as it shoots into the air and releases gas or sparks. This design feature adds an element of excitement and anticipation to the fireworks display, as the whistling sound builds up to the moment when the fireworks explode in a burst of color. Additionally, the whistling sound can also help to capture the attention of the audience and create a festive atmosphere during the New Year's Eve celebration. **

As a language model AI, I do not have physical possessions, so I do not have any leftover fireworks from last year. However, it is important to handle fireworks safely and responsibly, and to follow local laws and regulations regarding their use and storage. If you have leftover fireworks from last year, it is important to properly dispose of them or store them in a safe and secure manner. **

Yes, magnesium is commonly contained in sparklers. It is often used as the metal fuel in the pyrotechnic mixture of sparklers to produce the bright, white light and sparks when ignited. Magnesium is highly flammable and burns at a very high temperature, making it an ideal ingredient for creating the visual effects of sparklers. However, it is important to handle sparklers with caution and follow safety guidelines when using them. **

A good launching device for fireworks rockets is a sturdy and stable rocket launcher. This can be a commercially available launcher specifically designed for fireworks rockets or a homemade launcher made from PVC pipes or metal rods. The launcher should have a stable base to prevent tipping over during launch and a guide rod to ensure the rocket launches straight up into the sky. It is important to follow all safety guidelines and regulations when using a launching device for fireworks rockets. **