To show the awesome beauty of the molecule I showed a great site in class: http://www.umass.edu/molvis/tutorials/dna/ This was put together by Dr. Eric Martz and he lets people use it for free. I think being able to rotate and move the molecule, to zoom in, isolate nucleotide pairs, and all the features here are a great way to really appreciate how DNA works!
I encourage you to go to the site yourself and see what you can see. The link I gave above is the hands-on part. I thought I'd share with you my thoughts about this activity in a little movie (below).