If you are giving a speech, I think your topic of quilting is too broad. You could teach a whole semester on the topic! You need to narrow the field so it doesn't become "mush". Maybe you could demonstrate the tools of grandmother and the ones of today, explain the difference in the cost of a blanket and a quilt, the differences in fabrics, etc. But even these may be too broad. Narrow your topic and I think you will not have as much trouble with the process.