Well, I used my sister's single-crochet beanie pattern, and finally got one figured out! I made this one from Berroco Comfort. A great acrylic and nylon blend. It feels so good. I sent this one to Evan in Iraq for his birthday. I carried the yarn down for each stripe, so the inside looks kind of funny, but it worked.
I think I'll need to make a few more to really get the hang of the single crochet. They take longer than the double crochet pattern I usually use, but they are more tightly stitched, so they should be a little warmer. I'll probably make a couple more for the boys. And maybe one for Mark.
I have some superwash wool to make a hat and scarf for Alyx. So that project will be coming up soon. She wants a hat with ear flaps and strings. I found a cute one in the Happy Hooker crochet book.