This pattern is for knit slippers, but I can totally see using a wool sweater and cutting and serging slippers from it! Home Slippers - DIY. this is knitting, but I bet I could use this to crochet some
DIY crochet Comfy Snuggle Shawl with Hood - Free Pattern. I have got to start crocheting again and make this for my daughter who's always cold! She'd love it. Maybe make it in red. Little red riding hood!