This was a pretty easy garment to make. My great nephew (a large-ish two year old) will be cosy and warm when he gets them (view B), but it was really difficult to find a natural fabric with animals printed on it. My go-to shop didn't have any either! It should have been flannelette but I had to struggle with cotton jersey.
This needs a special needle, a jersey needle (yes, duh!).
The fabric wasn't that much more difficult but any thickness and it won't stitch. This was especially the case when I didn't trim the collar seam allowance. I did it to keep as much fabric as possible on the garment (it is a cold Winter in south eastern Australia) but I shouldn't have done it. As a consequence I couldn't do a buttonhole for the top button. I felt he probably wouldn't use it anyway (definitely, if it's not there!). The buttonholer does a rubbish job on this fabric and when it gets up to four layers it won't catch the thread at all.
Quite a good pattern, though.
You could sew the whole thing in a day, and I recommend the crazy cat pattern, but not jersey fabric: Very cute!