You will need yarn and a crochet hook of appropriate size. These hearts were crocheted using Caron's Simply Soft yarn in Rubine Red with a size F/5 (3.75mm) hook. You will want a hook that is a little smaller size than what is recommended for your yarn. This keeps the stitches close together so the stuffing won't escape. You will also need a yarn needle and about a handful of stuffing.