The writing here may need some explanation. It says "In your knee - Don't worry, Kirby will help you!" There is also a labeled "Kirby white cell". When I was using Picasa to fix the contrast and name this scan, I asked my boy what this all meant. This was a get well card that he made for his friend J. J hurt his knee and so his friend (my son) made him this imaginary battle scene of what was going on germ-wise under his skin. I guess Kirby is an awful lot like a leukocyte!