Just in case you were wondering,
Mother Nature has done a wonderful job of "watering our world." 
Just take a look at this great
diagram!
To learn a lot about water,
check Enchanted
Learning.
Even
second graders who studied the water cycle have a lot to say! Read their
ideas here.
If you know Fizz and Martina,
you won't want to miss this
song.
La-la-la-la-la! 
There's even a story about the water cycle with Fizz and Martina.
You are going to make a MicroWorlds project about the water cycle. These seventh graders made one, too - a little different than yours will be - but yours will be even better!!!
So...go for it!