Photography Ideas Around theme movement?

Ok. So i'm looking to take some photographs around the theme movement. As long as it fits loosely around the theme i should be fine, some ideas i have had so far are: car trails, a moving train with a person perfectly still, water movement (a river/lake waterfalls etc.) and thats it the problem is i need to plan and carry out around 7 shoots around this theme. And i'm stuck for ideas another problem i have encountered is that i do not have all the hi-tec stuff, i have a nikon d3100 and a wired shutter release button (for long exposures) but i could use stuff around the house or buy cheap things (like the shutter release if you know what i'm getting at).So to summarise what i'm looking for is some ideas to what i could photograph arouund the theme movement? Thanks in Advance.

Added (1). And yeah i have a tripod

Have you got a tripod? You will need that (or a very stable surface in the right place!) for long exposure shots.

Motion blur in water you'll have to do in low light levels or you'll get over exposure (I'm guessing you don't have neutral density filters?).

Other ideas;
second hand moving on a watch
a busy street scene
flicking through the pages of a book
spin an orb with a torch