Sadly, this product is currently out of stock -- toilet paper always runs out at the worst possible moment. But when it's available again, it will shine a light into the darker recesses of your bathroom. Normally on sale for £4.99.
http://www.thumbsupuk.com/products/Glow-in-the-dark-toilet-roll.htm?id=2&subid=0&prodid=630&cc= via Nerd Approved
Tee-hee.
;P