Sun bugs

You know those motes of dust that float through the air?  Well, according to Gman, they are “Sun bugs”.  He was sitting on the potty and I pulled a bit of TP off [sure to set the lint a-flyin’] and he started swatting at the air.  I asked “What are you doing?” and he replied, “I’m trying to catch one of the sun bugs, Mommy!  Try to catch one!”  Too funny, but makes perfect sense.  If you didn’t know any better what would you think if you saw hundreds of little white things randomly flying through the air, but only in the sunlight?