A felt painting doesn't have to be robust in the first place. Sometimes a motif looks perfect before it is completely fulled. As soon as your work meets your imagination, you can call it finished.
Some materials (ferns, grass, bark, feathers) may be used in felting but are not necessarily suitable for heavily used everyday objects.
Felting means to get involved with the natural substance wool, you get grounded, patient and even keep your fitness.
Creating felt pictures, or 'painting with wool' is a slow process that requires practice, persistence, and focus. But every time you succeed you are in seventh heaven!
Book: 'Light in the Landscape' by Peter Watson