The cat toy that cats love. My cat LOVES his! This is made in 2 parts. Would suggest using cotton yarn, but you can use a 3 or 4 weight yarn. A DK or Aran weight in the UK. You need a 4.00mm/G crochet hook, yarn needle, scissors, stitch marker, plastic grocery bag as stuffing or poly-fil, and 2 round bells(optional).