I found the book at the library last week and let The Girl thumb through it while I browsed another book. She immediately picked out a creature, grabbed a couple socks (one of them had a hole in it), and requested I make him.
Meet Sid...The Girl's newest friend. I think he looks like a funky character from Monsters, Inc with claws for hands. But he was a first attempt. He's made from a dingy cast-off sock and a couple of buttons and she loves him. That's all that really matters, isn't it?
Now The Boy wants one, too.
I discovered the author, John Murphy sells some of his creatures on Etsy...so if you don't want to make your own...