illuminated apparel interactive glow in the dark t-shirt - fun for birthday parties & festivals (blue/green glow, 9-11 years) illuminated apparel a unique interactive glow in the dark t-shirt for both adults and children; using the included glow torch, mobile phone torch or blue laser pen you can create your own designs on the clothing - again and again! they are perfect for everyone - whether you're at a festival, at home with the family or out with the friends. the glow effect lasts between 5-10 minutes, before fading away completely, this means you can keep interacting with the t-shirt throughout your day or night.