Every year on the fourth of July, fireworks light up the sky with giant bursts of color and patterns. Today, fireworks are so advanced they turn into shapes like hearts, stars and even smiley faces. But have you ever wondered how they do that? This segment shows you how.

Originally released by American Institute of Physics, 2016. Streaming video file encoded with permission for digital streaming by Infobase on July 05, 2016.

Fireworks Shapes - Smiley Faces, Hearts and Stars - Oh My! --(2:37) -- Intro to FireWorks -- (0:22).