The 3D Doodle Kit ($10) allows you to make 3 dimensional drawings using a compass style instrument and a blue and a red pen. The colored lines have the effect of lifting your creation off the paper, giving it depth when viewed through the special 3D glasses.
(Think.BigChief via Mike Ballan)
Great Post! You can pick up an extra pair of 3D Glasses for free at Rainbow Symphony. They will send you almost any kind of 3D ( I did not realize there were so many different kinds of glasses for different 3D applications)