For customisable floam, you can choose the colour of your foam balls/mircobeads. The prices will vary due to how much stock I have for the respective foam beads/mircobeads. The white foam beads are the cheapest. As for the customisable glitter slime, you can choose to add in a pinch of glow in the dark glitter. The amount of glow in the dark glitter you add affects the price of the slime. The more glow in the dark glitter you add, the more expensive the slime gets.