Use an old wooden frame with no glass. (I got mine at a garage sale for $1). Paint it to match the color of your child's room (great way to use up some old paint).
Next, staple ribbon in vertical strips to the back of the frame. Leave about 3/4 to 1 inch between the strips. When you turn it around, the front side of the ribbon should show. Hang on the wall at your child's height & she can clip on her own hairbows.
I used different widths of ribbon to accommodate different size hairbows.