I did trace off the pattern again, a couple sizes larger than the other versions. Said niece is above average in many ways for an 18 month old, most notably in size. The fabric is a dark red wool that I picked up at a thrift store awhile ago. It is beautiful fabric, but the piece wasn't large. It isn't a coat-weight wool, so I lined it with a quilted lining.
I really like how it makes the inside of the coat look, but it was not fun to sew with. The fabric is quilted to a very light batting and then a layer of foam.
That foam is super grabby and would not go through the machine. To make it work, I had to put a strip of tissue paper over the foam layer - both under the presser foot and over the feed dogs. In the end it worked out, but it took much longer. I do think it will make it comfortably warm.