Here is a link to some photos of a Test Track Cake a friend and I made this past weekend for a birthday party. I hope the link works...
http://www.facebook.com/media/set/?set=a.10150196791238876.307617.716763875&l=731df59135
http://www.facebook.com/media/set/?set=a.10150196791238876.307617.716763875&l=731df59135