Use an amount of salt equivalent to the amount of glitter that you want. There are no other ingredients besides food coloring, so the amount you start with will be the amount of glitter you get. For a sweeter glitter, you can try using granulated white sugar instead. There’s a risk that sugar might melt into a syrup, which will not happen with salt.
If you’re using a zip-locked bag, lay it on the counter and knead it to distribute the color.
If you’re using sugar, cover the baking sheet with parchment paper first. This makes cleanup easier if the sugar melts.
If using sugar, preheat it to 300ºF (150ºC) instead. This should stop it melting, but keep a close eye on it if your oven runs hot. You can just leave the tray out overnight to dry. Make sure it is out of reach of pets and young children.
If the salt has clumped together, break it up with a spoon.
Collect and wash brightly-colored sweet wrappers or gift wrapping paper. You can also lay sheets of tissue paper out over newspaper, and cover completely with clear nail varnish or clear-drying glue. Wait until dry, then repeat until there are two coats on each side of the paper.
You can get special hole punches that cut your paper into hearts, stars, or other shapes.
