I have heard that the reflectivity of CDs is beneficial to some groups of disabled children. They stick them onto walls, make mobiles etc. to help the kids to focus their attention.
Try contacting your local Health Authority or the Charities Commision who may be able to point you in the right direction.
Better still, there must be someone else in this helproom who might actually know what I'm talking about & be able to tell you exactly the types of bodies who utilise CDs in this way.