What I like about this is that it hits many learning styles. PBS has a great site that is included in the webquest. You can check this out here. After I had the students go through that with some questions they moved onto to drawing the phases of the moon. I like to think of it as a cross between a little doodling and coloring. It's an easy task to let the kids feel like they are getting a break. The whole activity ends with students looking up what the phase of the moon on the day that they were born. A site like this can be used.
Feel free to take this idea and make it your own, but if you would like to get the one that I made up you can find it on Syllabuy.
Take a look at my other lessons