No money for a summer vacation? I recommend DIY stop trick animation.
- Travel Cheap

Not too sneaky when you are out at night spraying a train or something.

Glow graffiti cans are filled with glow-in-the-dark paint and come with a bright LED light near the nozzle, which charges the paint. Powered with UV light you can write, stencil and draw rude pictures to create your very own glowing light show. [...]