ITA with Tartan, that you should be able to draft it out on graph paper.
It would be a good experience for your DGD too.
How about contacting the blogger who posted it?
I'd also look around the McCall's website, as I believe they have a Panda.
If not, there are lots of other block-like animals.
Another place for block animals is Quilters Cache.
If there's not a Panda, at least you will get the idea as to how to create your pattern.
Of course, maybe you aren't stuck on the Panda ... rather just the block technique?