This is a really fantastic pattern that will make a super cute frog! I made the choice to use upholstery fabric - to anyone curious it works, but you will increase your ladder stitching skills exponentially. Due to the thickness of the fabric and complete lack of any stretch I could not turn the legs or feet, so I back-stitched what i could wrong sides together and then flipped things around to sew the rest from the outside.
Not sure i would suggest doing this but my frog turned out great so I regret nothing! It would definitely have been easier with pretty much any other fabric but I think that it still works and looks excellent is a testament to beezee's pattern drafting skill.