Make it Sing!

To make the cat big enough to install a pull string music box insert, use worsted weight yarn (size 3, light / e.g. Scheepjes Cahlista, or Yarn and Colors Epic) on a crochet hook size 3.5 mm (US: E/4, UK: 9) and change the eyes size to 10-12 mm (4-5 inch) diameter.