Stefan, Niels and I were at Books Inc today and they had a couple of baskets by the register filled with giant microbes. They were picking them up and admiring them and pointing out that the chicken pox one is kind of cute, and looks a bit like a chicken. Then Niels picks up one and says, "what's this? It says 'her-ups'?" That's herpes, folks. They also had HIV and The Clap. There was also staph and strep and stomachache and others but somehow, we kept ending up with the, ahem, social diseases. In fact, I practically had to pry the clap out of Stefan's hands so he would leave it there. I actually said, "Put that back, we are not bringing the Clap home." I crack myself up.
Anyway, you can see why he liked it. It's kind of cute. It also bears a resemblance to the way the mystery animal on Zoboomafoo often appears. He had decided it was the mystery animal, and that's why he wanted it. So, I'm thinking that I could reproduce a mystery animal. All I need to do is crochet a body and head piece without adding arms and legs, right? I just need some safety eyes and cuddely, fuzzy yarn.
the sheep free knitter 
So, did you explain 'the clap' to him?
No! Niels understood that they were all diseases but he didn't ask me specifics on any of them.
If you knit just the head and body of Sheldon the Turtle from Knitty, this is basically what he looks like.
Try Chincilia yarn. Very soft and nice colors.