What you need:
Get a medium sized mug and put it a side get a bowl and full it half
way with water and put the mug in.
Then once you've finished that step you get some Glad Wrap and put it over tight.
Get 1 piece of string and put it around then top to secure. Once you've done that put it in the sunlight.
My prediction is that it will turn into jelly and wobble.
My prediction was wrong.
The sun heated the water and it evaporated up towards the glad wrap.
Condensation formed on the glad wrap. When the water vapour became heavy it dropped into the cup, like rain. (precipitation)