The finger flash is a method to ignite flash paper or cotton in your hand.  Method is safe, but always remember 3 things....stop, drop, roll.Just ball up the flash paper/cotton and stick it in the finger flash. It's secretly worn in your hand. Strike the flint wheel and whammo!!!!! A flashof light from your hand.NO FLASH PAPER OR FLASH COTTON IS INCLUDED.  YOU MUST BUY THESE THINGS SEPARATELY.