Fill a clear plastic container or bowl with a small amount of water
Place a small cup or bowl in the center
Cover the container tightly with plastic wrap
Put a small weight or stone on top of the plastic wrap above the center cup
Place the setup in a warm, sunny spot
Watch the water evaporate from the container
Observe water droplets form on the plastic wrap
See the droplets drip into the center cup
Repeat the process to show evaporation, condensation, and precipitation