Press four to five marshmallows onto a skewer or treat stick with a twisting motion. Lay on waxed paper.
Melt white candy according to package directions, making sure not to overheat. If the candy gets too hot, it will seize. If desired, add one teaspoon vegetable shortening or coconut oil to make the melted candy pourable.
Pour melted candy over the marshmallows allowing the excess to drop back into the bowl. For best results, scrape the candy from the bottom (the side you place on the waxed paper.) Allow to dry completely.
Transfer melted candy to piping bags, keeping the colors separated. One at a time, snip the corner from the piping bags, and drizzle colored candy melts over the marshmallows. While the candy is still wet, add sprinkles as desired.