Lisa, you've had some good suggestions on making buttonholes, but I'll add another.
You can make the simplest of all buttonholes simply by stitching a box slightly larger than your button and making a slit. If you want it to be stronger, thicker, and more interesting, you can add a second layer of fleece (contrasting or not) cut in an interesting shape, then sew the box through both layers and cut the slit.
You can also use the shape idea by laying it on the wrong side of the buttonhole area, stitching a narrow "football" shape, slitting it from end to end without cutting the stitching, and then turning the shape to the front side. If you grab both ends firmly and "snap" the fabric, it should turn and stay turned. (This is an old Robert Carr trick, from her Spanish Snap Buttonholes).
Have fun experimenting!
Karen Maslowski in Cincinnati