Charger Chamber - Developded under Funopolis, taken over by University Games. Ironic limitation of glow i the dark is you need light so glow items had to be indoor toys until the Charger Chamber. Used an internal photo flash to " Supercharge" the pigment. Worked really good but I could not convince University Games to tool up a plastic case before the trial at Toys R US. THe Chipboard version just didn't have the strength necessary for all around use.