Small stretcher frames can be covered with felt, or you can use canvas frames that have been either spray painted or covered with fabric as a base to put your fiber art on. I like to use Velcro as an alternative to sewing or gluing your art work to the frame. By using the Velcro, you can easily switch out your art if the sizes are similar.
This is the piece of art I made for my niece for Christmas. She told me she got new furniture that was red and blue. The stretcher frame is covered with black felt that has been backed with a stabilizer, the felt is too flimsy on its own.
Here is another version of using a stretcher frame. I layered the quilt top with batting and backing and quilted it. Once it was quilted I stretched the edges over the frame and attached it to the back with a staple gun. I think I would rather finish the piece and then stretch fabric over the frame and then attach it to the fabric on the frame. What do you think?