The first step to lining the barrette is to take it apart.
Next, measure your a piece of ribbon that will just fit between the end pieces that stick up. Heat seal the ends of this piece before putting it on the barrette. (I like to do this with a wood burning tool, but a lighter will also work.)
Remove the middle piece and set it aside for now.
Now, glue the piece to the center. You can use any glue you like, but I like to use hot glue. (Mainly because my fingers need the abuse....)If you use glue that takes a while to set, you might need to hold the ribbon in place with an alligator clip while it dries.
Now you can glue on your little bat (or whatever). You're going to want to hand sew this also. (Trust me!) but gluing will hold it in place nicely while you do.
MaryKay is slowly trying to dig herself out from under a mountain if fabric, one tutorial at a time.