The pompadour yarn is fine. You can use any pattern you like. You can then adjust the size to what you need. Also, I would suggest no fringe. Also, check out my links section.
Serendipity has several patterns for crocheted hats and also tiny sweaters.
I enjoyed making one of the helmets. Remember that you can adjust your hook size to get larger or smaller hats. For the answers to many questions I've been asked since starting this project, just go to my hints page . These questions are not specific to the PAC project but general crochet questions. Please check for loose threads etc. before sending them.