Deb Geyer has posted a video about using Elmer's School Glue as basting glue. This reminded me of another easily available school supply product that I use in quilting: that's Crayola Washable Markers. They make a great mark for quilting designs, easily visible and removable by washing. A warning though: don't use them on something you don't intend to wash, because although the marks come out cleanly, a lot of water is needed and there is a lot of ink. A spritz of water won't do the job. Also, I don't know whether you should use detergent or not, but I would assume so because mothers washing kids clothes do. I usually put my quilts through the rinse and spin cycle after the quilting is done, and the Crayola markers work great for this. Here's the twin quilts, one marked and ready to quilt and the other quilted and rinsed. (It needs fluffing in the dryer to look prettier.) Take my word that the marks that have been washed out were actually much darker than the ones you see in the picture.
Of course you should test the markers on a scrap first, and be sure to get the WASHABLE ones. :)