Believe it or not, these molecules really like to stick together. You can observe this property of water when checking out surface tension .
Molecules form when atoms share electrons.
In the case of water, the electrons spend more time at the oxygen end of a water molecule, making that end of the molecule somewhat negative. The result is that each little water molecule behaves like a small magnet with positive ends being attracted to negative ends of other water molecules. Slide the paper clip onto the surface of the water until it floats. Now, amaze your friends by touching your finger gently on the surface of the water after touching it to the bar of soap or a small amount of dish soap. If you don't know, you may want to set up an experiment.