Giantmicrobes.com has a pretty decent set of categories for their products - I like the organization. Also, they have started producing specialized human cells and small multicellular pests. Blog with educational suggestions: http://www.stemmom.org/2012/04/giant-menacing-microbes.html
Curious what the Epstein-Barr virus (Mono) looks like up close and personal? No longer do you have to wait for that home edition of the electron microscope to come to market. Just grab one of these Giant Plush Microbes! Various maladies available!
Keep one of these Gigantic Plush Microbes on your desktop to remind yourself that there is an "invisible" universe out there filled with very small things that can do incredible damage to much bigger things.