Crochet one large rectangle for back and two narrower ones for front and sew shoulder seams, leaving sides open (or just create one piece), attach yarn and crochet a hoodie! Add funky buttons, even if you don't have buttonholes - just for fun ;
Granny cardigan - free crochet diagram and lay out! My mom had one, same pattern. Only hers was 3 different shades of green, red, orange and yellow! She wore it everywhere and it was not pretty with that color combo!