The lunar eclipse tonight is a pretty rare event, so I wanted to explain to the kids what was happening before we watched it. I found this model online. (http://www.enchantedlearning.com/crafts/astronomy/sunearthmoon/)
It was very easy to construct and worked well as a visual for them to process the event.
The template for the circles can be found on the link above.
I just used yellow, blue, green, white, and brown cardstock paper. Each model takes three brads as well.
I cut the short strip of brown paper 4 inches instead of the 5 that is recommended. The long strip was cut to 8 inches. Simply connect the circles to the strips as pictured below.