Start by taping the edges of the shoes, covering the rubber soles. Cover both toes with tape as this is where the rhinestones will be glued on later.
Add one part course glitter to two parts Mod Podge into a small plastic cup or tray.
Stir the mixture thoroughly with a paintbrush. The consistency should be rather thick but not pasty. Apply a layer of the glitter mixture to the shoe. Allow to dry for 10-15 minutes and add a second and third layer until hardly any white space is showing. Use an exacto knife or the edge of your fingernail to scrape off any glitter that might have dried onto the grommets or soles.
Remove the tape. Using adhesive, glue the rhinestones on the toe in any pattern.
Sport your new glittery sneakers with or without laces!