Here is a story about a handful of atheists protesting a nativity scene. These must have been very brave atheists because they protested near religious symbols. I am sure they were afraid that these symbols on public property might convert them against there will. This must be so since they believe that just the mere presence of a Nativity scene on public property is a sign that Congress has established a religion and that those who are not Christians have had their free exercise of religion prohibited.
Now when Christian religious symbols are on display during Christmas we often have other symbols like the Menorah or even Islamic symbols. Up to this point atheists have been left out of these public displays except on occasional poster board sign stating unbelief. I think they should put up some atheist creches so that they are not left out. These would be simple to erect. Simply dig a hole and poor some water in it to symbolize a primordial swamp. To complete the effect add some sort of clock next to it to symbolize billions of years.
Update: Scrappleface posted along the same lines for a primordial soup display earlier today.