When making this edible slime recipe with starbursts, you can make all of the colors in the bag, you will just want to make each one following the directions for each color.
In a small bowl mix together the cornstarch and powder sugar, set it aside.
Unwrap all of the starbursts into a medium heat safe bowl. Using your kitchen shears cut each candy into for equal piece. Place half the starburst into another bowl.
Place the first bowl over a simmering pot of water. Keep stirring with a rubber spatula until all the candy is melted.
Pour the cornstarch mixture on your counter and put the first batch of melted starburst on top, allow to cool while you melt the second batch of candy.
Knead both of the melted starbursts together in the cornstarch mixture until the mixture is not sticky.