Sweatshirts are very nice and are sometimes like a double for a blanket.
Yes, or bythemselves they are like a mobile blanket for your upper body
And old ones let you remember the old days.
Yes they do, dont they. I was well aware of that since I have my old college one but I never put the two together
Some people stitch old tshirts into blankets so they can have memories.
I have seen these. That actually sounds like a fun thing to do. 
It does sound fun. There are also online retailers to do it for you.
I would want to do it myself. I think the experience would make it that much more meaningful.
That is cool. Do you have a sewing machine?
Sure do and I actually know how to sew by hand
You could be a sewing business and make them for others too.