I finally got brave enough to try.
I'm not a great seamstress, but I know just enough to be dangerous. Here is the result:
|By Spencer, age 3?|
If I had to do it again, I would have left more of an allowance in the fabric to compensate for the stuffing. It more closely resembled the original drawing before it was stuffed. Otherwise, I'm happy with how it turned out. Spencer loves it so we'll call it a success!