That's wonderful of you to donate your time to teach quilting. I have also taught kids, so here's just a few suggestions: DON'T ASSUME ANYTHING- even that they know the correct way to sit in front of the machine. Keep it simple! I know that sounds easy, but for quick donation quilts, they will want to see something get done, not an interesting design. Beginners will get bored with the precision, and the more talented kids will take over, leaving the less experienced with little to do. And PATIENCE PATIENCE PATIENCE!!! Not everyone's mother ( or whoever) has taught them the basics, and I've found for a lot of kids, even the simplest dexterity needed for a needle and thread does not come easily. Have fun!