Yay! I'm much happier with how this one turned out compared with the dodecahedron here ...
I kept the angles sharper by (a) sewing it right side out (I don't mind seeing the stitching - each side length is just 1.5 inches)
and (b) keeping the papers in and using much less stuffing.
Next stop: octahedron!
Thanks Annabel ( Bellgirl ) for the link back - I think your pentagon ball looks fab!