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
tutorial: knitting the loopy bind-off - La Visch Designs
I love making Quick Knit Cable Messy Ponytail Hat Accessories from the simple Honeycomb Stitch with Free Written Pattern and Video Tutorial by Studio Knit.