Hi! Typing one-handed, feeding baby- sorry! I haven't made the beanies, but I make flower clips so they can attach to crochet or reg. headbands. . .when I do that I just glue a ribbon covered alligator clip to the back of the flower. The clip will slip through the holes of the crochet. I guess it depends if you want it interchangable or not. If you want it permanent, I say go ahead and sew it. . .HTH!