The Colour Runs are growing in popularity here & look like they'd be a fun photo opportunity.
Basically a fun run where the runners get coloured powder thrown all over them .
The colour powder is cornstarch + food dyes.
http://thecolorrun.com.au/


if you are planning on shooting at one of these, you might want to read this info on what damage the powder can do from Lensrentals in the US ....

http://www.lensrentals.com/blog/2013...-without-water