First we put the water into the cup.

Then we put the shaving cream on top of the water.

Next we got the pipette and put some green food colouring on to the shaving cream. 

Finally we watched the food colouring go down.

Why it happens?

We tried to find out how and why it rains. In nature, when the sun is hot, it makes the puddles and water dry out. The water disappears up into the sky and makes clouds. When there is lots of water in the clouds, it is too heavy and then it rains. This i