Here is a nifty tool that lets you apply temporary tattoos all over your body without a whole lot of effort. The Prinker S is a smartphone connected temporary tattoo device with over 5000 unique designs for you to choose from. It uses skin-safe ink that is waterproof and lasts up to 2 days.
The device has a cartridge with enough ink to apply 1000 tattoos. It has a resolution of 1000 dpi and lasts 5 hours on battery.