Our glow in the dark octopus T shirt is an interactive T shirt that you can draw on with light! The illuminated tshirt is printed with a special ink that not only glows in the dark giving off an eerie glow, but can also be directly drawn onto with a small penlight. The afterglow of the drawing remains on the T shirt for up to five minutes and then gradually disappears, ready to be drawn on again. You can have endless fun creating illuminous shapes, lines and letters.