Me and my friend Drop, and all of our other friends mainly live in this lake. Now I know you can't see us, but with my other water drop friends we all blend in.
First, to start the cycle that me and all of my friends go though, our friend the sun shines on us.
His rays make us water droplets heat up. This means we are ready to evaporate.
Eventually all of my friends will join me in the cloud from water vapor ready to evaporate, from the energy of the sun. When we are up here we will change back into water and sometimes will freeze to lower temperatures. This is called condensation.
This will make the cloud heavier, and heavier as time goes on. The cloud will eventually become so full of water, that it can't hold anymore.