Phonic phones are incredibly simple devices. They are a simple plastic tube that go from the mouth to the ear and allow the reader to hear the sounds they are making. There is a great article HERE on the benefits of phonic phones and how to make your own! Phonic Phones can also be bought from many special needs catalogs (very cheaply).
Wendy uses them on a regular basis and has found them to be incredibly effective … in fact she is such an advocate that she often doles them out as gifts to schools she visits! Every home and school should have one.
I particularly like the design below which allows you to change the direction of the end pieces so you can listen to others more easily.