If you want to find out what it is, then you're going to have to catch up with Marla on her current book tour for A Couple of Boys Have the Best Week Ever. Sudo Nimm doesn't allow spoilers on this blog.
This is my family after learning the mysterious creature's identity.
Here's Marla creating a composite portrait from the features of five different kids. It was amazing to watch.
On to mussel penguins, and I don't mean the body-building kind. I mean the bivalve kind. Marla's newest picture book contains a simple three-step recipe for creating a penguin from a mussel shell. Unfortunately, the dark lighting in the photo masks the fine specimen she's holding.
Not photographed are Marla's cool kicks, a pink polka-dotted pair of chic shoes.
Technical note to aspiring and perspiring picture book authors: Check out Marla's newest book, A Couple of Boys Have the Best Week Ever, for examples of writing contrapuntally.