Also, as rockets become larger and more powerful the exhaust from the engine would consume the guide-stick, destroying the rockets mode of guidance. Fireworks have remained popular in today's age due to the spectacle of colors and sounds they are so renown for. After the rocket engine has consumed all of its fuel an internal fuse is lit that delays the release of the stars, or other effect. This delay allows for coasting time where the rocket continues its ascent. The delay usually lasts just before this apex, at an optimum velocity, where a small explosion shoots the firework's stars in desired directions and thus producing a brilliant effect.
Fireworks are the simplest of solid rockets and the weakest.
Evolution from fireworks brought about more complex solid fueled rockets, which use more exotic and powerful fuels. Yet with all these drawbacks fireworks will continue to maintain their use as a traditional pastime with an on-going history of nearly 5,000 years.