Glow-In-The-Dark Halloween Tattoos. For a ghostly glow, wear these spooky tattoos with your Halloween costume! You can also hand out these pumpkins, monsters, black cats and other creepy critters to trick-or-treaters for a fun alternative to candy. Easy to apply and remove. Safe and non-toxic. (6 dozen per unit) 1 1/2" Expose items to daylight to activate glow. © OTC