How great that quilt turned out - loop the loop and all LOL>
You came up with a perfect idea for the material though and what a delightful present for a great grandchild to use and have as a keepsake.
Two more things - waffling is totally acceptable from excited great grandma's to be in particular AND as someone else pointed out = THERE ARE NO QUILT POLICE!!! (even in England there would be no quilt bobbies LOL) So carry on - your work is delightful.