Depending on the grand kids ages, I would give them some spools and fabric scraps to play with, maybe a needle and thread to start stitching with or for the older ones, have them learn along with you and have them help you figure it out, or make one of their own, while you are working on yours. Often, the best way to learn how to do something is to teach it to someone else. Or do you have a girlfriend that wants to learn quilting also? If you do it together with a friend, you can bounce ideas off each other and talk out the questions you have.
Have fun with the process!