Red dahlia, laser; yellow dahlia, white chrysanthemum; purple dahlia, silver crackle; red dahlia, green dahlia, long crackle. Fountains are fireworks that are ground based. Once lit, they erupt beautifully coloured sparks and often whistle or crackle. Fountain fireworks can reach up to 20ft in height. These fireworks are perfect for all types of displays - both low noise and larger displays.