E-Commerce is a great solution, as other people have suggested. Or a portfolio web site would be even easier. Also, a picture sharing web site might work out well for them (family members could log in and upload, too?)
I would also add you should use the visual (design) mode in visual studio for the best effect. And then show the HTML it generates after the page is run/compiled. That way you cover for the people who are more visual learners and get into the code later. But I'm sure you were already going to do that :)
