Best use of the jelly roll race technique is to get kids using the sewing machine. Every time we have a 4-H showcase in my county I end up with the sewing display. I set up two or three machines with the strips started and let kids sew as long as they want. It teaches them to keep the seam even and controlling the speed. I use scrap strips and we usually can get at least one done in the 3 or 4 hours we have for the show. then the quilts are tied or I machine quilt them and they are donated. Have to turn kids on to sewing some how.