This is something my mother used when she worked in childcare. It's a black light for panel theater. You can create a fantastic story time like a movie theater, using not only white panels but also black panels, attaching the black light to the panel, and utilizing picture figures made with fluorescent paint. I remember it cost around 30,000 yen at the time. It's been 10 years since I bought it. Shipping costs extra, so no price reduction is possible.