Eric Carle made the same mistake in his Very Hungry Caterpillar book. Whenever I read it to the class, I tell them that Eric must've thought that first graders couldn't "handle" a word like chrysalis! ha!
In Charlie, he stays in his cocoon all winter--another indication that he might be a moth--but I'm not sure! Are there caterpillars that stay in a chrysalis all winter?
I LOVE Charlie, too--read it just last week as part of our insect unit. I think it fits VERY well with friendship! Do you know the book Big Al? He's a very ugly fish that no one wants to play with because he's ugly. Then one day, a school of fish gets caught in a big net. Big Al rescues them by biting through the net (I think--haven't read it in a while! the details are fuzzy) but ends up getting caught himself. The fishermen take one look at him and throw him back because he's ugly! However, the rescued fish are there waiting and are very grateful for what he had done. I think the two books would compare and contrast beautifully!
I love GoTeacher's idea! I guess the only other suggestion I would put out there is to each do a page (or work cooperatively!) for a class book called, "How to Be a Friend". The more books you read and the more discussion you have, the better their responses will be!
These two books focus on LOOKS. You might want to get books that deal with other friendship issues such as tattling (Tattling Madeline), copying (Rita the Copycat and Stephanie's Ponytail), playground tyrants (Stand Tall Molly Lou Melon and The Recess Queen), bragging (The Popcorn Dragon) etc.
WOW!!! Now I've got some GREAT ideas myself for a friendship unit!!! Thanks for starting this thread and good luck!
Now I "gotta get outta here!"