Very Hungry Caterpillar - Adorable baby gift or costume! This doesn't link to a pattern but is easy to accomplish by changing up the colors on an existing pattern, then adding the simple details to the hat. Would work for knit or crochet.
The pattern consists of 7 pages with written explanation and pictures. This pattern consists of a detailed description on how to make the horse rattle and additional instructions on how to adjust it to make a donkey rattle and a unicorn rattle.
Crochet Mermaid Cocoon Baby Pattern Is Totally Adorable