Photo Scavenger Hunt

Am trying to organise a Photo Scavenger Hunt for a friend's birthday on Friday. Found a great website called 26 Things that posts a list of words every year. People have to take a photo to represent each photo and send in their entries. Cool idea! I'll let you know how I get on with mine. Can't decide whether to tell people what to do, e.g. get a photo of someone doing a star jump, or the random word thing for people to then get a bit more creative about?! Hmmm...