Shirley, I am so sorry about your grandson. (((((HUGS)))))
I’ve never made a t-shirt quilt but others have and they’ll have good suggestions for you.
Crafty Bear posted the following links a long time ago about making t-shirt quilts.
http://quiltbug.com/articles/Tshirt-quilts.htm
Video 1 of 4:
http://www.youtube.com/watch?v=ua6Tosh6OU8
Video 2 of 4:
http://www.youtube.com/watch?v=EVIyhuyKngc&feature=fvw
Video 3 of 4:
http://www.youtube.com/watch?v=CFjg9...aynext_from=PL
Video 4 of 4:
http://www.youtube.com/watch?v=HNorn...aynext_from=PL