My suggestions:
1) when you use quilting terms, define them.
2). Keep it simple and show only a couple but bring more for after show viewing.
3). Share the time and money involved to put a value on this craft. Your show&tell quilts should be quantified with hours spent and money....plus how you were inspired to create it.
have fun....7 minutes goes by fast when you're speaking about your passion. Let them hear the PASSION in your voice....smile often.
you go, girl...