The most important rule of thumb when working with pyrotechnics is to read all associated instructions before you start. You might also look into the Consumer Product Safety Commission’s guidelines for using fireworks safely and avoiding injury. That said, all products available from Red Apple Fireworks are designed with safety in mind, and they are rigorously tested to ensure high quality. You can trust that the 500 gram cakes you purchase from Red Apple will meet any safety standard — and they should exceed your expectations, to boot.