Good idea. Visuals are always good in a presentation.
Thoughts I'd include:
1) Quilting uses and encourages mathematical thinking and logic - much like carpentry.
2) Requires understanding of geometry - although many of us don't really think we have an understanding of geometry.
3) Encourages personal relationship building, collaboration and teamwork.
4) Keeps learning skills intact for your entire life.
5) Allows one be a good citizens through charity work.
6) Encourages family relationships through teaching, learning and giving to family members.