There are a few things you can do to make sparkles in Illustrator. The first is to use the Sparkles tool. This tool allows you to create sparks by selecting a color and then pressing the OK button. You can also use the Sparkles tool to add highlights and shadows to your illustrations. The second thing you can do is to use the Stroke tool. This tool allows you to create lines, arcs, and other shapes in your illustrations. The third thing you can do is to use the Filters tool. This tool allows you to change the color, opacity, and other properties of your illustrations.