Here's a very simple way to make some beautiful fireworks of your own, safely inside.
Water down a little tempera paint in several different colors and put each in a shallow bowl. Cover one end of a straw with your finger and dip the other end in the bowl. Put the straw over your paper and release the paint. Blow the paint in several directions. Before it dries, sprinkle with glitter. Don't pick it up until it's completely dry.