pictures show water drop and its action.

You need:
-plastic bag
-Needle
-Water ofcourse
-Macro Lens (canon100mm Macro) your camera lens should get you started but a real macro lens works a lot better.
-A tripod is very useful but is not essential,sometimes i just use a diet coke can :P

Setup: The setup does NOT have to be perfect, Use a tripd to align your camera close to your subject, preferably keeping the subject parallel to the lens so that everything is in focus. You need to be close, You can handhold the camera, but focusing can be difficult. Next, use the neeedle and pinch the plastic gently to drop water from the ground.