Well, I was wrong.

He did a great job. He was polite. He wasn't a huge distraction. He sat and knit, ate his dinner and observed. At one point he turned to me and said, "It's like one person says something then everyone else starts talking." Yeah, that's pretty much how it goes. I shuttled him back to the house when he was done eating and walked back over to enjoy a little kid-free knitting time. I made a lot of progress--which I hope is error-free-- on the Knot & Cable Jacket.
I also turned the heel on one of the Lupine Lace socks when I got home. I have to transfer one to another needle because of how the stitches are distributed. I can't pick up the gusset stitches with both on the same needle.