Chrysalis or Cacoon

I was going to put this in the quotes but when I decided to include a WikiAnswer I decided to make it a post.

Daddy: "Look, Keahi, I made a chrysalis around myself."
Keahi: "No that is not a chrysalis. It's a cacoon."
Daddy: "Chrysalis. Cacoon. What's the difference?"
Keahi: I can't write exactly what he said but it was something to the effect that chrysalis is for a specific butterfly but inside a cacoon could be other things.

So I looked it up and he was right. Here's something from WikiAnswers:

From WikiAnswers:

A cocoon is a covering made of silk that encloses a pupa, and a chrysalis is the pupa of a butterfly. The chrysalis is covered in a hard, chitnous shell.

Note the difference: A cocoon is a covering of a pupa, and a chrysalis is a particular kind of pupa, usually with no enclosing cocoon.

Inside a cocoon, you will often find a pupa of a moth or other insect with an inner chitinous shell, but it is not called a chrysalis unless it is the pupa of a butterfly. The pupae of some insects have visible external body structures, such as wings and legs, as they develop, while others (such as moths) have a smooth outer shell that encloses the developing structures.

When we asked him where he learned this he said from a show on Noggin: Little Bill. And he proceeded to describe exactly what happened in the episode. Wow. He really is a sponge.