That's so cute.
I just read an article in the Quilter's Newsletter today where a 71 year old gentleman wrote that his grandmother taught him to quilt on a treadle machine when he was about 6 years . He said if he made a mistake his grandmother would make him unsew it and do it over. But she would always allow him to leave one mistake in the quilt and told him that only God makes things perfect, so one mistake was allowable. He said even though his grandmother had passed, he still loved to quilt.
Your grandsons will remember how you took an interest and allowed them to do this. They are two cute young guys.
Thanks for sharing.