They were level one and level two havenworlders, but they wanted to get stronger. They had seen on television human fireworks shows, the sound of the explosions muffled while pleasant music played in time to the bright lights and sparkles. They hit on an idea. They would have humans teach them to make, and use, fireworks. Starting with small, what humans would consider almost "harmless" things, and work their way up to the beautiful splays over time. Their first endeavors? Slightly loud bubble-wrap that lit up when popped.