Glitter doesn't seem so messy when it's encased in play dough.
1/2cupcream of tartar
In a large pan mix flour, salt, cream of tartar, water, and oil until no lumps remain. Heat over medium heat until the mixture is very thick. Remove the mixture and knead until very soft and pliable. Add food coloring and glitter and knead until thoroughly mixed. Keeps for weeks in a airtight container. Makes about 4 cups of play dough.