Coming up on my to-do list is a new pair of pajamas for my 9-year-old son. So far I've made things like this in flannel and quilting cottons, but I'm wondering about other options. Sigh...he's getting awfully grown up! Any recommended fabrics for solids, stripes...other thoughts? I'd like to find something comfortable and somewhat fun. Maybe I could use a fun quilting cotton for the trim. Suggestions? Thanks!