This was made for the halloween party. Break open a highlighter pen and drop the ink fibre thing into water. Give it about an hour to let the ink diffuse out then stick it near a blacklight (the one pictured was procured from Apliu St for HK$130). Et viola, phosphorescence. For bonus points use the remainder of the fibre stick to write I SEE DEAD PEOPLE on a nearby wall.
Hong Kong's First Hackerspace
